Can't stay hard? Causes of soft erections and what helps

What "can't stay hard" usually means

It usually means you can get an erection but it fades before or during sex, or never gets fully firm. Doctors treat this as a form of erectile dysfunction when it keeps happening.

Getting an erection, keeping it, and firmness are three different complaints, and a clinician asks about each. It matters whether it is occasional or persistent, and whether it started suddenly or gradually. For the wider picture, read about erectile dysfunction. For the in-the-moment version, see losing an erection during sex.

Soft erection vs no erection

A soft erection, where the penis fills but doesn't get rigid, often points to reduced blood flow or blood not being held in. A complete absence of erections points the clinician in other directions too.

Morning erections are a useful clue; see no morning wood. Soft erections with a partner but firm ones alone suggest a psychological part. None of this is a self-diagnosis, only a way to describe the problem accurately to a clinician.

Blood flow and venous leak

An erection needs strong inflow and blood held in the penis. Narrowed arteries reduce inflow, and venous leak lets blood drain out too fast.

Venous leak is diagnosed by a specialist, not online. Risk factors for poor blood flow include smoking, high blood pressure, high cholesterol and diabetes. New ED can be an early heart warning.

Medications, hormones and other conditions

Some medications, low testosterone, diabetes and nerve problems can all make erections soft or short-lived.

Some antidepressants and blood pressure medicines can contribute; don't stop anything without the prescriber. Low testosterone usually shows up as low desire too, and a blood test confirms it. See ED and diabetes. Pelvic surgery or injury can also play a part.

Weak erections that keep happening: what a clinician asks

When weak erections keep happening, a clinician asks when they started, how they behave, and what else is going on in your health.

Expect questions like these:

• Did it start suddenly or build up gradually?
• Do you still wake with erections? See what no morning wood can mean.
• Is it the same alone and with a partner?
• Has your desire changed?
• Which medicines, alcohol and tobacco do you use?
• Do you have heart risk factors, such as high blood pressure, diabetes, high cholesterol, smoking, or chest pain with exertion?

Write your answers down before the visit. They help the clinician separate a blood flow problem from a hormone, medication or mental-health cause.

Tests a clinician may order

A clinician may check your blood pressure and order blood tests. Which tests depend on your history and symptoms.

Common categories are blood sugar to look for diabetes, cholesterol, and testosterone when desire is low. A specialist handles venous-leak testing; it is not done online. See ED and diabetes for one common link.

What you can change yourself

Exercise, better sleep, quitting smoking and drinking less can all improve erection quality over time. These help blood vessels, not just erections.

Aerobic exercise helps, along with weight and blood sugar control, and less alcohol; see ED and alcohol. A small randomized trial in BJU International in 2005 found that men with long-standing ED who did supervised pelvic floor exercises did better than men who only changed lifestyle habits. It is one small study, so treat it as promising, not proven. Stress and sleep matter too.

Treatments clinicians use

Many men start with a PDE5 inhibitor such as sildenafil or tadalafil, which helps blood flow during arousal. Daily low-dose tadalafil is an option for some men who want no timing.

Read about daily tadalafil. Compounded combinations exist for some patients; see the 3-in-1 combination tablet. When pills don't work, specialist options include devices, injections, and referral to urology; apomorphine is another prescription option clinicians discuss. Never use these medicines with nitrates. If you already tried a tablet, read why ED pills sometimes don't work.

Why an ED tablet may not keep you hard the first time

The Viagra and Cialis labels both say the drug has no effect without sexual stimulation, so a tablet cannot work on its own. Timing and dose also matter.

The Viagra label gives a dosing window before sexual activity and says it may be taken with or without food. It also says a high-fat meal reduces the rate of absorption. The Cialis label says it may be taken without regard to food, and describes daily use as taken at the same time each day regardless of when you have sex. The Viagra label lets the prescriber raise or lower the dose, so a weak result is a reason to talk to the clinician rather than to take more. Compare the two in sildenafil vs tadalafil.

Compounded medication prescribed only if a licensed U.S. clinician decides it is appropriate. Not FDA-approved as a finished product. Not available in California.