Erectile Dysfunction: Symptoms, Causes, Diagnosis, Treatment and Myths
Are you worried about erectile dysfunction (ED)? You’re not alone, and there’s no need to feel embarrassed. Many men experience ED, and it’s a common issue that can be treated. This article is here to help you understand ED better and show you that there are solutions available.
You might be concerned about privacy and confidentiality when seeking treatment, but rest assured, your consultations with healthcare providers are private. Maybe you’re feeling embarrassed or ashamed to talk about ED. It’s important to know that ED is a medical condition, not a personal failing, and many men go through the same thing.
What is Erectile Dysfunction?
Erectile dysfunction is a condition where a man has difficulty getting or keeping an erection firm enough for sexual intercourse. While it’s normal for men to experience occasional difficulties with erections, ED is diagnosed when it happens frequently and causes distress or relationship issues.
Difference Between Impotence and Erectile Dysfunction
Impotence is an older term that refers broadly to various sexual performance issues, including lack of sexual desire, trouble achieving an erection, or problems with ejaculation. Erectile dysfunction specifically refers to problems with getting or maintaining an erection.
Types of ED
Erectile dysfunction can vary in severity and form:
- Primary ED: This is rare and occurs when a man has never been able to achieve or maintain an erection. It is often due to a physical or anatomical issue.
- Secondary ED: More common, this occurs when a man who previously had normal erectile function develops ED. It can be caused by physical or psychological factors.
How Erections Work
Physiological Process of Achieving an Erection
Understanding how erections work can help you understand what might go wrong in the case of erectile dysfunction. Here’s a simple breakdown of the process:
- Sexual Stimulation: Erections usually start with sexual arousal. This can be due to physical touch, thoughts, or visual stimuli.
- Signal from the Brain: When you’re sexually aroused, your brain sends signals through your nerves to your penis.
- Blood Flow: These signals cause the muscles in the penis to relax. This relaxation allows blood to flow into the spongy tissues inside the penis.
- Engorgement: As these tissues fill with blood, the penis becomes larger and firmer, resulting in an erection.
- Maintaining the Erection: The blood vessels close off, trapping the blood inside the penis to maintain the erection.
Prevalence and Usual Age of Erectile Dysfunction
Statistics on the Prevalence of Erectile Dysfunction
Erectile dysfunction is a common condition that affects men worldwide. Here are some key statistics:
- Global Prevalence: Approximately 15-30 million men in the United States alone are affected by ED. Globally, it’s estimated that over 150 million men experience ED, and this number is expected to double by 2025.
- Prevalence in India: A study conducted in the southern part of India in 2015 concluded that a total of 15.77 percent men were suffering from erectile dysfunction.
- Age-related Prevalence: The likelihood of experiencing ED increases with age. Studies suggest that about 40% of men at age 40 experience some form of ED, and this percentage increases by about 10% per decade. For example, by age 70, approximately 70% of men may experience ED to some extent.
Typical Age Range for Erectile Dysfunction
While ED can occur at any age, it is more common as men get older. Here is how it typically presents across different age groups:
- Young Men (Under 40): Although less common, ED can affect younger men, often due to psychological factors such as anxiety, stress, or depression. Lifestyle factors like smoking, alcohol use, and lack of exercise can also contribute.
- Middle-aged Men (40-60): The prevalence of ED increases in this age group. Physical factors such as cardiovascular disease, diabetes, and hormonal changes often play a significant role.
- Older Men (60 and above): ED is most common in this age group. The cumulative effects of aging, chronic health conditions, and medication side effects contribute to higher rates of ED.
Symptoms of Erectile Dysfunction
Erectile dysfunction can manifest in various ways. Here are the common symptoms:
- Difficulty Getting an Erection: You may struggle to achieve an erection even when sexually aroused.
- Difficulty Maintaining an Erection: You may get an erection but have trouble keeping it firm enough for sexual intercourse.
- Reduced Sexual Desire: You might experience a decrease in sexual interest, which can be linked to ED.
When to See a Doctor
It’s important to seek medical help if you experience any of the following:
- ED that is frequent or severe
- ED that causes you stress or affects your relationship
- ED accompanied by other symptoms like pain or discomfort
- Concerns about your sexual performance or health
Causes of Erectile Dysfunction
Understanding the causes of erectile dysfunction is essential to addressing the issue effectively. ED can result from various physical, psychological, and lifestyle factors. Here, we’ll explore these causes in detail.
Physical Causes
Several physical health conditions can lead to erectile dysfunction. These include:
- Cardiovascular Diseases: Conditions such as heart disease, high blood pressure, and high cholesterol can damage blood vessels, reducing blood flow to the penis and making it difficult to achieve an erection.
- Diabetes: High blood sugar levels can damage blood vessels and nerves, which are crucial for achieving an erection. Men with diabetes are at a higher risk of developing ED.
- Obesity: Excess weight can contribute to heart disease and diabetes, both of which are risk factors for ED. Obesity can also affect hormone levels and overall energy levels, impacting sexual performance.
- Hormonal Imbalances: Low levels of testosterone, the primary male sex hormone, can lead to erectile dysfunction. Hormonal issues can be caused by conditions such as hypogonadism or thyroid problems.
Psychological Causes
Mental health plays a significant role in sexual function. Psychological causes of erectile dysfunction include:
- Stress: Everyday stress from work, finances, or relationships can potentially interfere with sexual arousal and performance.
- Anxiety: Performance anxiety, in particular, can create a vicious cycle where fear of ED causes stress that makes ED worse.
- Depression: Depression can lead to a lack of interest in sex and difficulty achieving an erection. Additionally, many medications used to treat depression can cause ED as a side effect.
Lifestyle Factors
Certain lifestyle choices and habits can contribute to erectile dysfunction:
- Smoking: Smoking damages blood vessels, reducing blood flow to the penis, which is necessary for an erection.
- Alcohol Consumption: While moderate alcohol use might not cause ED, heavy drinking can lead to liver damage, nerve damage, and other conditions that can interfere with erectile function.
- Lack of Physical Activity: A sedentary lifestyle can lead to obesity, cardiovascular problems, and poor circulation, all of which are risk factors for ED.
Medications
Some medications can cause erectile dysfunction as a side effect. These include:
- Antidepressants: Medications used to treat depression can affect sexual function.
- Blood Pressure Medications: Certain drugs used to manage high blood pressure can interfere with erections.
- Pain Relievers: Some prescription pain medications can cause ED.
Other Physical Conditions
Other medical conditions that can cause erectile dysfunction include:
- Peyronie’s Disease: This condition involves the development of scar tissue inside the penis, causing curved, painful erections.
- Multiple Sclerosis (MS): MS can interfere with the nerve signals that lead to an erection.
- Parkinson’s Disease: This neurological condition can affect sexual function.
Understanding the Multifactorial Nature of ED
Often, erectile dysfunction results from a combination of physical, psychological, and lifestyle factors. For example, a man might have a mild physical condition that affects blood flow, but the resulting anxiety makes the ED worse. Addressing ED typically involves considering all these factors and making comprehensive changes to improve sexual health.
Risk Factors for Erectile Dysfunction
Several factors can increase the likelihood of developing erectile dysfunction. Understanding these risk factors can help you identify potential issues early and take steps to address them.
Age
Erectile dysfunction becomes more common as men age. While younger men can experience ED, it is more prevalent in men over 50. Aging can cause changes in blood flow and muscle function, which are critical for an erection.
Medical Conditions
- Diabetes
- Cardiovascular Diseases
- Obesity
- Hormonal Disorders
Medications
- Certain Medications: Some drugs, including antidepressants, blood pressure medications, and pain relievers, can cause ED as a side effect.
Psychological Factors
- Stress and Anxiety
- Performance Anxiety
Lifestyle Choices
- Smoking: Smoking damages blood vessels, reducing blood flow to the penis, which is necessary for an erection.
- Alcohol Consumption: Excessive drinking can interfere with erections, while moderate drinking is less likely to cause issues.
- Lack of Exercise: A sedentary lifestyle can lead to obesity and cardiovascular problems, increasing the risk of ED.
Other Risk Factors
- Peyronie’s Disease: As already mentioned, this condition involves the formation of scar tissue inside the penis, causing painful, curved erections.
- Multiple Sclerosis (MS) and Parkinson’s Disease: These neurological conditions can affect nerve signals and lead to ED.
By recognizing these risk factors, you can make informed decisions to reduce your chances of developing erectile dysfunction.
Diagnostic Tests and Procedures
To diagnose erectile dysfunction, a doctor might:
- Take a Medical History: Ask about your symptoms, medical conditions, and medications. Understanding your medical history helps identify potential underlying causes of ED.
- Perform a Physical Exam: Check for physical problems that could be causing ED. This may include examining your penis and testicles and checking your nerve function.
- Order Blood Tests: Look for underlying health issues like diabetes, heart disease, or low testosterone. Blood tests can help identify medical conditions contributing to ED.
- Conduct a Psychological Exam: Assess for depression, anxiety, or other psychological factors. Mental health can play a significant role in erectile dysfunction, and addressing these issues can be crucial for treatment.
- Use Specialized Tests: In some cases, tests like nocturnal penile tumescence (NPT) or penile Doppler ultrasound may be used to evaluate blood flow and nerve function. These tests can provide more detailed information about the physical causes of ED.
Erectile Dysfunction Treatment Options
There are various treatment options available for erectile dysfunction, ranging from medications to lifestyle changes. The right treatment depends on the underlying cause of ED, the severity of the condition, and individual preferences.
ED Medications
Several medications can help treat erectile dysfunction by improving blood flow to the penis, making it easier to get and maintain an erection.
Sildenafil
- What is Sildenafil? Sildenafil, commonly known by its brand name Viagra, is a medication that helps men with ED achieve an erection by increasing blood flow to the penis.
- Mechanism of Action: Sildenafil works by inhibiting an enzyme called phosphodiesterase type 5 (PDE5), which regulates blood flow in the penis.
- Dosage and Administration: Sildenafil is usually taken about 30 minutes to an hour before sexual activity. It should not be taken more than once a day.
- Side Effects and Precautions: Common side effects include headaches, flushing, indigestion, and nasal congestion. Men taking nitrates for heart conditions should not take sildenafil, as it can cause a dangerous drop in blood pressure.
Cialis
- What is Cialis? Cialis, or tadalafil, is another medication for ED that works similarly to sildenafil but has a longer duration of action.
- Mechanism of Action: Like sildenafil, Cialis inhibits PDE5, increasing blood flow to the penis.
- Dosage and Administration: Cialis can be taken as needed or once daily. When taken as needed, it should be taken at least 30 minutes before sexual activity, with effects lasting up to 36 hours.
- Side Effects and Precautions: Common side effects include headaches, indigestion, back pain, and muscle aches. Men taking nitrates should avoid Cialis due to the risk of a significant blood pressure drop.
Sildenafil Citrate
- What is Sildenafil Citrate? Sildenafil citrate is the active ingredient in Viagra. It works the same way as Viagra and is available in generic forms.
- Mechanism of Action: Inhibits PDE5 to increase blood flow to the penis.
- Dosage and Administration: Similar to sildenafil, it is taken 30 minutes to an hour before sexual activity and should not be taken more than once a day.
- Side Effects and Precautions: Similar side effects to sildenafil.
Other Pharmacological Treatments
In addition to sildenafil and Cialis, other medications are available for treating ED:
- Vardenafil: Another PDE5 inhibitor, marketed as Levitra, works similarly to sildenafil and tadalafil.
- Tadalafil: The active ingredient in Cialis, also available in daily low doses.
Non-Pharmacological Treatments
For men who cannot take medications or prefer alternative treatments, non-pharmacological options are available:
- Vacuum Erection Devices: These devices create a vacuum around the penis, drawing blood into it and causing an erection. A constriction ring is then placed at the base of the penis to maintain the erection.
- Penile Implants: Surgical implants can provide a permanent solution for ED. There are two types: inflatable and malleable implants. Inflatable implants allow for control over the timing and duration of an erection, while malleable implants keep the penis in a semi-rigid state.
Lifestyle Changes
Making healthy lifestyle changes can significantly improve erectile function and overall health:
- Diet and Nutrition: Eating a balanced diet rich in fruits, vegetables, whole grains, and lean proteins can improve blood flow and reduce the risk of conditions that cause ED.
- Exercise: Regular physical activity can help maintain a healthy weight, improve cardiovascular health, and reduce stress—all of which can enhance erectile function.
- Avoiding Smoking and Excessive Alcohol: Quitting smoking and limiting alcohol intake can improve blood flow and overall health.
Psychological Therapy
For men whose ED is caused or worsened by psychological factors, therapy can be very effective:
- Cognitive Behavioral Therapy (CBT): Helps address negative thoughts and behaviors related to sexual performance.
- Sex Therapy: Focuses on improving sexual communication and intimacy between partners.
- Stress Management: Techniques like mindfulness, meditation, and relaxation exercises can reduce stress and anxiety related to ED.
Medical Devices
In addition to vacuum erection devices, other medical devices can assist with ED:
- Penile Pumps: Similar to vacuum erection devices, these pumps draw blood into the penis to cause an erection.
- Constriction Rings: Used in conjunction with pumps or on their own, these rings maintain an erection by preventing blood from leaving the penis.
Surgery
For men who do not respond to other treatments, surgical options are available:
- Vascular Surgery: In some cases, ED is caused by blood flow problems due to damaged blood vessels. Vascular surgery can repair these vessels, improving blood flow to the penis and enabling better erections. This option is typically considered for younger men with a clear vascular cause of ED.
Alternative ED Treatments
While medications like sildenafil and Cialis are popular treatments for erectile dysfunction, some men may prefer or require alternative options due to health reasons or personal preferences. Here are some alternative treatments for ED that can help improve sexual function.
Herbal and Natural Remedies
Several herbal and natural supplements claim to improve erectile dysfunction. However, it’s important to consult with a healthcare provider before trying any of these remedies, as their efficacy and safety are not always guaranteed.
- Ginseng: Often referred to as “herbal Viagra,” ginseng is believed to enhance erectile function. Some studies suggest that it may help improve erections and increase sexual satisfaction.
- L-Arginine: This amino acid helps produce nitric oxide, which relaxes blood vessels and improves blood flow to the penis. Some men find that taking L-arginine supplements helps with ED.
- Yohimbe: Derived from the bark of an African tree, yohimbe has been traditionally used to treat ED. However, it can have serious side effects and should only be used under medical supervision.
- Horny Goat Weed: This herb is believed to have properties that help with ED. While some men report benefits, scientific evidence is limited.
Acupuncture
Acupuncture, a traditional Chinese medicine practice, involves inserting thin needles into specific points on the body. Some studies suggest that acupuncture may help improve erectile function, particularly when ED has a psychological component. The theory is that acupuncture can reduce stress and improve blood flow, contributing to better erections.
Pelvic Floor Exercises
Also known as Kegel exercises, pelvic floor exercises can strengthen the muscles involved in erections. These exercises are simple to perform and can be done anywhere. Strong pelvic floor muscles can help improve blood flow to the penis and enhance erectile function.
Doing these exercises the right way is very critical to improve your condition. Hence, you should consult a certified sexual health expert to learn the right way and monitor your improvement.
Common Misconceptions About ED
There are many myths and misconceptions about erectile dysfunction. Here are a few common ones:
Myth: ED is just a natural part of aging.
Fact: While ED is more common in older men, it is not an inevitable part of aging. Many older men have no trouble with erections, and many younger men experience ED.
Myth: If you have ED, you’re not attracted to your partner.
Fact: ED can happen even if you are very attracted to your partner. It often has more to do with physical health or emotional stress.
Myth: ED is caused by stress alone.
Fact: While stress can contribute to ED, it is often caused by a combination of physical and psychological factors.
Managing Erectile Dysfunction
Coping Strategies for Men with Erectile Dysfunction
Dealing with erectile dysfunction can be challenging, but there are several strategies that can help manage the condition effectively:
- Open Communication: Talk openly with your partner about your condition. Honesty can reduce anxiety and strengthen your relationship.
- Seek Professional Help: Consult a healthcare provider to explore treatment options and get professional advice.
- Stress Management: Practice stress-reducing techniques like deep breathing, meditation, or yoga. Reducing stress can improve sexual function.
- Healthy Lifestyle Choices: Adopt a healthy lifestyle, including regular exercise, a balanced diet, quitting smoking, and limiting alcohol consumption.
- Therapy: Consider individual or couples therapy to address psychological factors contributing to ED.
Importance of Communication with the Partner
Communication with your partner is crucial when dealing with erectile dysfunction. Here’s how to approach the topic:
- Be Honest: Explain how ED affects you and reassure your partner that it is a medical condition.
- Listen: Encourage your partner to share their feelings and concerns.
- Work Together: Discuss treatment options and strategies to manage ED as a team.
- Seek Support: Consider couples therapy to improve communication and intimacy.
Counseling
Seeking counseling can provide emotional support and practical advice which plays a very vital role in treatment of erectile dysfunction:
- Professional Counseling: A certified therapist can help address emotional and psychological aspects of ED, improving overall well-being.
Complications
Physical and Psychological Complications Associated with Erectile Dysfunction
Erectile dysfunction can lead to several complications, affecting both physical and mental health:
- Emotional Distress: ED can cause feelings of embarrassment, guilt, and low self-esteem. It can lead to anxiety and depression.
- Relationship Issues: ED can strain relationships, leading to frustration and decreased intimacy between partners.
- Decreased Quality of Life: The inability to engage in satisfying sexual activity can impact overall quality of life and well-being.
Preventing Erectile Dysfunction
While not all cases of erectile dysfunction can be prevented, adopting healthy lifestyle habits can reduce the risk and improve overall sexual health.
Healthy Lifestyle Choices
- Balanced Diet: Eating a diet rich in fruits, vegetables, whole grains, and lean proteins can improve blood flow and reduce the risk of conditions that lead to ED. Foods like leafy greens, berries, nuts, and fish are particularly beneficial.
- Regular Exercise: Engaging in regular physical activity can improve cardiovascular health, reduce stress, and maintain a healthy weight, all of which are important for preventing ED. Aim for at least 30 minutes of moderate exercise most days of the week.
- Healthy Weight: Maintaining a healthy weight can prevent conditions like diabetes and heart disease, which are risk factors for ED. Weight loss can also improve ED in overweight or obese men.
Avoiding Smoking and Excessive Alcohol
- Quit Smoking: Smoking damages blood vessels and restricts blood flow to the penis, increasing the risk of ED. Quitting smoking can improve overall health and erectile function.
- Limit Alcohol Intake: While moderate alcohol consumption is unlikely to cause ED, excessive drinking can lead to liver damage, hormonal imbalances, and nerve damage, all of which can contribute to ED. Limiting alcohol intake can reduce these risks.
Regular Medical Check-ups
- Monitor Health Conditions: Regular check-ups with your healthcare provider can help manage chronic conditions like diabetes, high blood pressure, and heart disease, which are linked to ED. Early detection and management of these conditions can prevent or reduce the severity of ED.
- Medications Review: Discuss your medications with your doctor to understand if any might cause or contribute to ED. In some cases, alternative medications with fewer sexual side effects can be prescribed.
Managing Stress and Mental Health
- Reduce Stress: Chronic stress can interfere with sexual arousal and performance. Techniques such as yoga, meditation, and deep breathing exercises can help manage stress.
- Mental Health Care: Addressing mental health issues like anxiety and depression is crucial. Professional counseling or therapy can provide strategies to manage these conditions and improve sexual health.
What to Do if Your Partner Has Erectile Dysfunction
Supporting a Partner with Erectile Dysfunction
When your partner has erectile dysfunction, it can be challenging for both of you. However, providing support and understanding is crucial for overcoming this issue together.
Open Communication
- Start the Conversation: Gently bring up the topic and express your concerns without blaming or shaming your partner.
- Listen: Allow your partner to share their feelings and fears. Understanding their perspective can help you both address the issue more effectively.
- Reassure: Let your partner know that ED is a common issue and that you are in this together. Reassurance can reduce anxiety and build trust.
Encourage Seeking Help
- Professional Help: Suggest consulting a healthcare provider to explore treatment options. Sometimes, just talking to a professional can make a significant difference.
- Therapy: Consider couples therapy to address any underlying emotional or relational issues that may be contributing to ED.
Focus on Intimacy
- Non-Sexual Intimacy: Engage in activities that build closeness and intimacy without focusing on sex. Cuddling, holding hands, and spending quality time together can strengthen your bond.
- Explore Alternatives: Experiment with different forms of sexual activity that don’t rely on an erection. This can help maintain intimacy and reduce performance pressure.
Be Patient and Understanding
- Patience: Overcoming ED can take time. Be patient and avoid putting pressure on your partner to “perform.”
- Empathy: Understand that ED can be frustrating and embarrassing for your partner. Showing empathy and support can help them feel less isolated and more willing to seek solutions.
Encouraging Open Communication
- Create a Safe Space: Ensure that your partner feels safe and supported when discussing ED.
- Be Honest: Share your feelings and concerns honestly, but do so with kindness and understanding.
- Work Together: Approach ED as a team issue rather than your partner’s problem alone. Collaborating on finding solutions can strengthen your relationship.
Seeking Joint Counseling or Therapy
- Couples Therapy: A therapist can help you navigate the emotional and relational aspects of ED. They can provide strategies to improve communication and intimacy.
- Sex Therapy: Specialized therapists can help address sexual issues and provide practical advice on overcoming ED.
What Questions Should I Ask a Healthcare Provider?
When consulting a healthcare provider about ED, consider asking the following questions:
- What could be causing my ED?
- What tests do I need to diagnose the cause of my ED?
- What treatment options are available, and which do you recommend for my situation?
- Are there any lifestyle changes I can make to improve my condition?
- Are there potential side effects of the treatments you recommend?
- How can I involve my partner in the treatment process?
Conclusion
Erectile dysfunction is a common condition that affects many men worldwide, impacting their physical, emotional, and relational well-being. Understanding erectile dysfunction is the first step towards addressing it effectively.
If you or your partner are experiencing erectile dysfunction, it’s important to remember that you are not alone. ED is a common and treatable condition. Seeking help from a healthcare provider is a critical step towards finding an effective solution. Treatment can significantly improve your quality of life, restore confidence, and enhance your relationship.
Hence, if you are also suffering from this menacing condition in silence, it is time to speak up and book a consultation with Dr Monga’s in Delhi today. They have multiple clinics across Delhi NCR with many certified sexual health experts who have treated thousands of patients of erectile dysfunction over the years.
FREQUENTLY ASKED QUESTIONS
Erectile dysfunction can be caused by a variety of factors, including physical conditions (such as diabetes, heart disease, and hormonal imbalances), psychological issues (such as stress, anxiety, and depression), lifestyle choices (such as smoking and alcohol consumption), and certain medications.
While ED is more common in older men, it is not an inevitable part of aging. Many older men maintain healthy erectile function, and ED can often be treated effectively regardless of age.
Yes, lifestyle changes such as maintaining a healthy diet, exercising regularly, quitting smoking, and reducing alcohol intake can significantly improve ED. These changes can enhance overall health, which in turn benefits erectile function.
Yes, there are many effective treatments for ED, including oral medications (such as sildenafil and tadalafil), lifestyle changes, psychological therapy, vacuum erection devices, and in some cases, surgery. The best treatment depends on the underlying cause of ED and individual preferences.
Yes, psychological factors such as stress, anxiety, depression, and relationship issues can cause or contribute to ED. Addressing these factors through therapy or counseling can often help improve erectile function.
- Erectile Dysfunction: Diagnosis and Treatment (https://www.sciencedirect.com/science/article/abs/pii/S0002934300006550)
- Epidemiology of Erectile Dysfunction (https://www.nature.com/articles/3900949)
- Physiology of Penile Erection and Pathophysiology of Erectile Dysfunction (https://link.springer.com/chapter/10.1007/978-1-4613-1087-7_1)
- Is smoking a cause of erectile dysfunction? A literature review (https://www.magonlinelibrary.com/doi/abs/10.12968/bjon.2001.10.7.5331)
- Erectile Dysfunction: An Umbrella Review of Meta-Analyses of Risk-Factors, Treatment, and Prevalence Outcomes (https://academic.oup.com/jsm/article-abstract/16/4/531/6966810)
- Evaluation and Treatment of Erectile Dysfunction (https://www.medical.theclinics.com/article/S0025-7125(10)00151-3/abstract)
- Sildenafil for Erectile Dysfunction (https://jamanetwork.com/journals/jamainternalmedicine/article-abstract/211714)
- Alternative medicine and herbal remedies in the treatment of erectile dysfunction: A systematic review (https://www.tandfonline.com/doi/full/10.1080/2090598X.2021.1926753)
- Psychological and Interpersonal Dimensions of Erectile Dysfunction (https://academic.oup.com/jsm/article-abstract/2/6/793/6863039)
- Psychological Impact of Erectile Dysfunction and Its Impact on Quality of Life (https://www.auajournals.org/doi/abs/10.1016/S0022-5347%2805%2964302-9)
- The Prevalence of Erectile Dysfunction in Men: Results from the Massachusetts Male Aging Study (https://www.auajournals.org/doi/abs/10.1016/S0022-5347%2805%2967900-1)
- Sexual function and obesity (https://www.nature.com/articles/0803604)
- Erectile Dysfunction in Young Men (https://academic.oup.com/smr/article-abstract/5/4/508/6830741)
- Diagnosis and treatment of erectile dysfunction (https://www.sciencedirect.com/science/article/abs/pii/S0002934300006550)
- An epidemiological study of sexual disorders in south Indian rural population (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4462783/)