Causes
An erection depends on healthy blood flow, nerves, hormones, and mood, so problems in any of these areas can contribute:- Vascular disease: Narrowed arteries from atherosclerosis - the same process behind coronary artery disease and peripheral arterial disease - is the most common physical cause. ED can appear years before heart symptoms do.
- Diabetes: Long-standing diabetes damages both the small blood vessels and the nerves involved in erections.
- Hormonal problems: Low testosterone and thyroid disorders can reduce desire and performance.
- Medications: Some blood pressure medicines, antidepressants, and prostate treatments list ED as a side effect. Never stop a medication on your own - ask your physician about alternatives.
- Psychological factors: Stress, performance anxiety, relationship strain, and depression can cause or worsen ED, and often coexist with physical causes.
- Lifestyle: Smoking, heavy alcohol use, inactivity, and excess weight all impair blood-vessel health.
Symptoms
The pattern of symptoms offers useful clues. Gradually worsening erections over months to years point toward a vascular or metabolic cause, while sudden-onset ED - especially when morning erections are preserved - suggests a psychological contributor. Reduced sexual desire alongside fatigue may point toward low testosterone. If symptoms have persisted more than a few months, or are straining your confidence or relationship, that is reason enough to be evaluated.Diagnosis
Evaluation starts with a straightforward, confidential conversation and a physical exam. Blood tests commonly check morning testosterone, blood sugar, and cholesterol, since ED is frequently the first clue to undiagnosed diabetes or lipid problems. Because ED and heart disease share the same root causes, your physician will also assess your overall cardiovascular risk, review your blood pressure, and go through your full medication list for common, correctable contributors.Treatment
Most men can be treated successfully:- Oral medications: Phosphodiesterase-5 (PDE5) inhibitors such as sildenafil and tadalafil improve blood flow to the penis and work for most men. Sildenafil is taken as needed before sexual activity, while tadalafil is longer acting; your physician will match the choice to your health and preferences. They must never be combined with nitrate heart medications, which can cause a dangerous drop in blood pressure.
- Treating the underlying cause: Better control of blood sugar, blood pressure, and cholesterol - plus quitting smoking and regular exercise - improves erections and protects the heart at the same time. Even modest weight loss and a consistent walking habit measurably improve vascular health.
- Counseling: When anxiety or depression contributes, therapy alone or combined with medication is often effective.
- Other options: Vacuum erection devices, penile injections, and surgical implants are available through urology when pills are not enough.
Getting ED Treatment to Work
The pills for erectile dysfunction work for most men, and most men who say they failed used them wrong, gave up after one try, or had a cause the pill was never going to fix. What follows is the practical side of treatment and the reasons the evaluation matters beyond the bedroom.
Taking the medication so it works
Sildenafil is taken about an hour before sex on an empty stomach, because a fatty meal can halve its absorption, and it requires sexual stimulation; it does not create an erection on its own. Tadalafil lasts through the weekend and can instead be taken as a small daily dose, which suits men who dislike planning and also eases the urinary symptoms of prostate enlargement. A medication is judged after several attempts at the full dose, not one. Headache, flushing, and a stuffy nose are the common side effects. Nitrates for chest pain are an absolute contraindication, and pills bought online without a prescription are frequently counterfeit.
Why the evaluation looks at your heart
The arteries supplying the penis are narrower than the coronary arteries, so they narrow first, and erectile dysfunction typically appears several years before a heart attack in men whose cause is vascular. That is why the workup checks blood pressure, cholesterol, and blood sugar, and why a man with symptoms of coronary artery disease is evaluated before sexual activity is resumed. Our ED as a cardiovascular warning article explains the connection, and treating hypertension, high cholesterol, and diabetes improves erections as well as protecting the heart.
Testosterone: when it helps and when it does not
Testosterone is measured in the morning and repeated if low before low testosterone is diagnosed. Replacement with testosterone cypionate restores desire and improves the response to PDE5 inhibitors in men who are truly deficient, and does nothing for erections in men with normal levels. Our when to test and treat low testosterone article covers the decision.
The quiet contributors
Thiazide diuretics, some beta-blockers, SSRIs such as sertraline, and finasteride commonly worsen erections and can often be swapped. Untreated sleep apnea, obesity, smoking, more than two drinks a day, and long hours on a narrow bicycle saddle each contribute. Weight loss and regular exercise improve erectile function measurably on their own.
When pills are not enough
A vacuum device, penile injections that work in most men who fail pills, and an implant with high satisfaction rates are all available through urology, and a curvature that has developed with pain is evaluated for Peyronie's disease. Performance anxiety that started after a physical cause responds to counseling. Our genito-urinary team coordinates that referral, and our men's health after 40 article covers the rest of the checkup. NIDDK and MedlinePlus publish patient guidance on causes and treatment.
If erections have become unreliable for more than a few months, schedule a visit; the conversation is brief and the evaluation is routine.