The Real Causes of Erectile Dysfunction (It’s NOT What You Think It Is)
30 Jun 2026 · 11 min
In this episode, Dr. Anne Truong MD challenges the common belief that low testosterone is the main driver of erectile dysfunction (ED). She explains that while low testosterone can contribute to reduced firmness and shrinkage, it is rarely the primary cause. Dr. Truong outlines the five leading lifestyle‑related contributors to ED: excessive alcohol consumption, smoking, obesity (BMI > 30), diabetes, and hypertension/high cholesterol. She details how alcohol damages both the penile nerves and smooth‑muscle relaxation, leading to the colloquial “whiskey dick.” Age itself is not a direct cause; rather, age‑related health conditions increase ED risk. The host then addresses a listener’s question about persistent testicular soreness, emphasizing that any consistent pain warrants prompt evaluation by a urologist, with ultrasound imaging to rule out infection, cysts, torsion, or cancer. Finally, Dr. Truong recommends actionable lifestyle changes, highlighting the Mediterranean diet as a research‑backed approach to improve circulation, support healthy testosterone, and enhance sexual performance. Listeners are directed to her website for additional resources.
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If you're assuming low testosterone is the primary cause of erectile dysfunction, you are trying to solve the wrong problem. And worse, popping a quick pill to mask it might be blinding you to what your body is actually trying to warn you about. Today we're breaking down the top 5 real drivers of ED, the exact way alcohol physically shuts down your nerves, and the one warning symptom down there that means you need to call a doctor today. Put the quick fixes on hold for 5 minutes. Let's look at the actual science.
This podcast is for you, the modern man. I'm Dr. Anne Truong MD, your host. I'm an intimate health medical doctor and bestselling author of the book Erectile Dysfunction Fix. I'll do a deep dive into sexual health and performance and how it affects men of all ages and backgrounds. So So let's get started and be sure to visit my website at sexualhealthformenpodcast.com for more information and resources from the show. See you on the inside.
So is testosterone important for erection? So testosterone is a male hormone that makes a man a man. All right. A man has 100 times more testosterone level than a woman. A woman conversely have 100 times more estrogen level than a man. They're saying that low testosterone can be the cause of ED. Well, erectile dysfunction is multifactorial, meaning multiple things can cause ED. So ED is not just one thing, it is multiple contributing factors. Your penis has multiple receptors for testosterone. And receptors like the opening to the key, right? That's a receptor. You put your key in and the testosterone is the key and opening is the receptor. And in the penis, there are multiple receptors for testosterone. When you have low testosterone, it's less keys to go into the hole. So when there's less key to go into the hole, low testosterone can contribute, but not primary cause of ED. It will contribute to shrinkage. It will also contribute to firmness and increasing blood flow as well. So when you have low testosterone, it's one of many causes of ED. So that's one. So low testosterone, yes, can contribute, but it's not the primary factor. Meaning if you supplement testosterone, if you take either testosterone injections or pellets, oral testosterone, even gel, not necessarily that will fix your ED. So what's the number one cause of ED? What's the number one contributor to ED? You'll be surprised to find out what is the number one cause of ED. Number one cause of ED is actually alcohol. It's more lifestyle. So excessive alcohol. I mean, you're allowed like 14 drinks a week. But excessive alcohol is one. Number two is smoking. Number three is obesity or overweight, BMI over 30. And number four is diabetes. And number five is high blood pressure and high cholesterol. So having said that, things that you can cut down is smoking and alcohol consumption. Why does alcohol contribute to ED? Because When you're drinking alcohol, it affects the nerve as well as affecting the muscle of the penis. And therefore, you actually have less sensitivity and you also have less relaxation of the penis muscle. So it contributes to erection in nerve and also in muscle. And that's something to know because, you know, there's a term called whiskey dick. If you drink too much alcohol, then it's going to affect your erection. So that's actually the number one cause of ED. And age, the older you are, does not mean you're going to have ED. It's just that when you get older, you tend to acquire medical conditions such as high blood pressure, high cholesterol, diabetes, and overweight. And then you also get low testosterone. All that add into contributing to erectile dysfunction. But not age, necessarily age is the cause of ED. Just know that ED, if you're young, like in your 30s, your 40s, starting to notice ED, first things off, are you smoking? Are you drinking too much alcohol? Are you doing porn? How is your sleep? Are you overweight? Check those things. What's defined as overweight? When your BMI is over 30. BMI means body mass index. Okay. You can get that formula right off the internet and calculate that formula. Some Quick tips there. So oftentimes ED is reversible if you know what causes it. And I just kind of told you the most common cause of ED. So the last thing you want to do is you find out that you have ED and maybe it's contributed by alcohol or maybe porn or smoking. Well, what do you end up doing? Go online. Next thing you know, you're taking a Viagra pill from an online dispensary. And that's not the route that you want to go because your ED can totally be reversed and treated if you really take some time to look at the cause of ED. You know, this is a common question we get. Question says, hello, what are some causes of left testicle area being slightly sore sometimes, more like on the attachment area behind the testicle. If your testicle is sore and it's consistent every day, you need to get evaluated by a doctor. I'd see a urologist who specializes in the penis and the testicles because if it's sore, it could be a sign of infection, it could be a sign of blockage, it could be a sign of cancer, it could also be a sign of a cyst. So it needs to be evaluated. Is it consistent day after day? I would advise you to do testicle massage the same way that women do breast exam. You should do testicle massage every day so you can feel the texture of your testicle. You can feel the cord, the spermatic cord that goes to the prostate. So your testicle make testosterone and it also makes sperm. But in a sac, which is your scrotum outside the body, because the testicle needs to be 1 or 2 degrees cooler than the body to make testosterone and sperm. If you are working inside, you sit down a lot, and if you wear pants, sometimes that can affect the temperature of the testicle as well. So if you have trauma to the testicle, as in like some type of blunt force, or if you ride a bike a lot, you definitely need to have to be evaluated. It's kind of like a woman finding her breast be tender or a lump in her breast. It needs to be evaluated and you shouldn't take it lightly. So guys, if you have tenderness in the testicle, it could be a lot of things. So you need to be evaluated first. You can't just say, well, it doesn't hurt that much. I'll just lie on it. You need to get evaluated because testicular cancer is a possibility as well as a cyst. As well as an infection. Like sometimes the cord, the spermatic cord, that is a cord that goes up to bring the sperm to the prostate area, that gets a kink. That can kink and that can turn called torsion. That can cause soreness as well. So you definitely need to be evaluated with a doctor and then something ordered as an ultrasound that can look at the structure of the testicle to see if there's any type of blockage. Oftentimes the test is benign, very easy to do. It's the same ultrasound that women have to look at babies, but they can visually see the scrotum quite well there. You know, there's another follow-up question here about testicle soreness. Again, you need to be evaluated. Okay. You can't just assume it's a blockage or lack of ejaculation. You can't assume that. Well, it's like a woman having a mass in her breast. Can't assume anything because a mass in the breast for a woman could be a cyst, could be scar tissue, could be cancer. But don't sit on it. Get evaluated. So I have another question. I assume it's occasional blockage. You can't assume it. You can't assume anything because you need imaging to know what it is. You can just go see the doctor, get an ultrasound, and it will show what it is. So don't sit on— don't diagnose yourself either. Okay. Because I have another comment here. Well, I assume it's a blockage. How do you keep it from happening? Lack of ejaculation does not cause testicle pain, right? Ejaculation have nothing to do with testicle pain. Sometimes testicle pain can be from trauma, but it could be multiple causes that can be easily diagnosed by just an imaging test called the ultrasound. So the function of the testicle is to bring the sperm up into the prostate and the prostate store the sperm. In a sac called the seminal vesicle. And then when you ejaculate, the sperm along with the seminal fluid comes out, and the seminal fluid protects the sperm to allow it to survive in the female. So that is the function of the testicle. Okay, Modern Man, if you're struggling with weak erection, low energy, the food you eat could be the big part of the problem. One of the best research-backed way to boost circulation, support healthy testosterone, and improve sexual performance is the Mediterranean diet. It's packed with food that open up your blood vessel, lower inflammation, and fuel your hormone naturally. I've seen men notice real improvement in both energy and erection within weeks when they shift to this style of eating. So check out this Mediterranean diet link right here below and get that as soon as you can. Stronger testosterone and better erection.
Thanks for listening to the Sexual Health for Men podcast. If you love this episode, then please take a screenshot on your phone and post it on Facebook, Instagram, or wherever you post, and be sure to tag me and let me know why you like this episode and what you'd like to hear in the future. That will help me know what's great for you, and I would love to give you the most incredible free gift designed to help you improve performance quickly. Go to my website at sexualhealthformenpodcast.com to get the book, The 5 Common Costly Mistakes Men Make When Facing ED. I would appreciate it if you subscribe, leave a review on Apple Podcasts or wherever you listen, and just know that you can have sexual Vitality for Life. I appreciate you. Until next time.
