What Is Erectile Dysfunction? Causes, Symptoms, and Treatment Options

Erectile dysfunction (ED) is a condition that prevents you from getting or keeping an erection firm enough for sex. It was once commonly called impotence, but that term is used less often today. An occasional difficulty getting an erection isn't unusual and isn't necessarily a cause for concern — ED refers to a pattern that happens often enough to be a problem.

Importantly, ED is frequently a symptom of another health issue rather than a standalone problem. That's part of why it's worth understanding rather than ignoring.

Very. Research cited by the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) suggests that between 30 million and 50 million men in the United States have ED. It also becomes more common with age: roughly 40% of men are affected at age 40, and about 70% report ED by age 70.

But here's the key nuance, and one urologists emphasize: while ED is more common as men get older, it is not a routine or inevitable part of aging. It usually points to something specific and addressable.

According to NIDDK, the symptoms of erectile dysfunction can include:

• Being able to get an erection sometimes, but not every time you want to have sex
• Getting an erection, but not being able to keep it long enough for sex
• Being unable to get an erection at any time

Because ED can be a sign of an underlying condition, persistent symptoms are worth raising with a healthcare provider.

An erection depends on healthy blood vessels, nerves, hormones, and a degree of psychological arousal. A problem in any of those systems can cause ED. NIDDK groups the causes into a few buckets.

Physical and medical causes

• Blood vessel disease (vascular): atherosclerosis (hardening of the arteries), high blood pressure, and other cardiovascular conditions that reduce blood flow.
• Diabetes: one of the most common contributors, in part because it can damage both blood vessels and nerves over time.
• Nerve damage (neurological): multiple sclerosis, spinal-cord injury, stroke, or nerve damage from pelvic surgery.
• Hormone issues: low testosterone or thyroid imbalances.
• Other conditions: obesity, chronic kidney disease, an enlarged prostate, or Peyronie's disease (penile curvature).

Medications that can contribute

Some prescription and over-the-counter medicines can cause or worsen ED, including certain blood-pressure medicines and diuretics, antidepressants, antihistamines, some pain relievers, sedatives, and others. Never stop a prescribed medication on your own — talk to your provider if you suspect a connection.

Psychological and emotional causes

Anxiety, depression, stress, low self-esteem, and relationship difficulties can cause ED or make it worse. Psychological factors are an especially common driver in younger men. Often, physical and emotional causes overlap.

You're more likely to experience erectile dysfunction if you have certain risk factors. Per NIDDK, these include:

• Older age
• Diseases such as diabetes, heart disease, and obesity
• Certain medicines (for example, some blood-pressure drugs and antidepressants)
• Mental-health and emotional factors like anxiety and stress
• Lifestyle behaviors — smoking, drinking too much alcohol, not getting enough physical activity, and recreational drug use

The encouraging part: several of these are modifiable, which is why lifestyle change is a legitimate part of ED treatment.

This is one of the most important things to know about ED. The same process that clogs arteries elsewhere in the body — atherosclerosis — also affects the arteries that supply the penis. Because those arteries are smaller, they often get affected first. As the Mayo Clinic explains, that means ED can show up before a heart problem becomes obvious.

In fact, studies suggest ED can precede the onset of heart-disease symptoms by roughly three to five years. ED and heart disease also share many of the same risk factors — diabetes, smoking, high blood pressure, and high cholesterol. For that reason, clinicians often recommend that men with unexplained ED be evaluated for cardiovascular risk. In other words, ED isn't just about your sex life; it can be a meaningful signal about your overall health.

Diagnosing ED usually starts with a conversation, not a procedure. A provider will typically review:

• Your medical and sexual history — including the medicines, vitamins, and supplements you take, and questions about desire, erections, ejaculation, and climax.
• Your mental and emotional health — since stress, anxiety, and depression can play a role.
• A physical exam — to check for blood-vessel, nervous-system, hormonal, or physical issues.

Depending on what they find, a provider may order blood tests (including thyroid or prostate tests), an ultrasound to look at blood flow, a nighttime-erection test, or an injection test. Many men, though, can be evaluated and treated based largely on their history and a review of their health.

ED is highly treatable, and there's usually more than one option. Treatment generally starts with the least invasive approaches.

Lifestyle changes

Quitting smoking, limiting alcohol, getting regular physical activity (guidelines suggest at least 150 minutes of moderate activity per week), eating well, and maintaining a healthy weight can all help — and they address the underlying health issues ED is often connected to.

Oral medications (PDE5 inhibitors)

The most common first-line treatment is a class of pills called PDE5 inhibitors, which improve blood flow to the penis. The four FDA-approved oral PDE5 inhibitors in the U.S. are sildenafil (Viagra), tadalafil (Cialis), vardenafil, and avanafil. The American Urological Association recommends them as first-line therapy for most men, unless there's a reason they can't take them.

They differ mainly in timing. Per FDA labeling, sildenafil is typically absorbed within about 30 to 120 minutes (a median of 60 minutes) and is generally effective for several hours, while tadalafil can improve erectile function for up to 36 hours after a dose — which is why it's sometimes called the "weekend" option.

Other medical options

• Testosterone therapy — for men who have both ED and confirmed low testosterone, sometimes used alongside a PDE5 inhibitor.
• Injectable medicines or suppositories that increase penile blood flow.
• Vacuum erection devices — a pump-and-ring system that draws blood into the penis.
• Surgery (penile implants) — typically reserved for when other treatments haven't worked.

HELMD's own treatment, Drive, is a compounded sublingual tablet that combines two PDE5 inhibitors (sildenafil and tadalafil) with apomorphine, prescribed after an online visit. Compounded medications are not FDA-approved. You can read more about how Drive works.

It's worth talking to a provider if ED is happening regularly, if it's affecting your confidence or relationship, or if it came on alongside other symptoms. Because ED can be an early sign of cardiovascular and other conditions, a medical evaluation is a smart first step rather than self-treating.

Seek care right away if you take an ED medication and experience an erection lasting longer than four hours (a condition called priapism), or any sudden change in vision or hearing.

Is erectile dysfunction a normal part of aging?

No. ED becomes more common with age, but per NIDDK it is not a routine part of aging. It's usually caused by an underlying — and often treatable — condition.

Can erectile dysfunction be cured or reversed?

It depends on the cause. ED driven by emotional factors or a medication is often easier to reverse, while ED from physical damage to nerves or arteries can be harder to fully cure. Even then, it can frequently be managed effectively.

Can lifestyle changes improve ED?

Yes. Quitting smoking, maintaining a healthy weight, exercising regularly, eating well, limiting alcohol, and reducing stress can all help prevent or improve ED.

Is erectile dysfunction linked to heart problems?

It can be. ED can be an early warning sign of cardiovascular disease, sometimes appearing years before other symptoms, because the smaller penile arteries are often affected first.

Do I need a prescription for ED medication?

Yes. PDE5 inhibitors are prescription medicines, and they require a provider's review because of potential interactions — especially with nitrates.

• ED is common and treatable. An estimated 30–50 million U.S. men experience it, and most have effective options.
• It's not just aging. ED usually reflects a specific, often addressable cause — vascular, neurological, hormonal, medication-related, or psychological.
• It can be a health signal. Unexplained ED can be an early warning sign of cardiovascular disease, so it's worth getting evaluated.
• Treatment is a spectrum. Lifestyle changes, oral PDE5 inhibitors, and other medical options exist — but the right one depends on your situation.
• Talk to a provider first. ED medications interact with some drugs, so a professional review matters before starting treatment.