Blood vessels: the plumbing problem
An erection requires blood to enter and remain in the penis. Diabetes, high blood pressure, smoking, and high cholesterol may harm blood vessels and make erections harder to achieve. Because ED can be an early marker of cardiovascular disease, the rest of your circulation matters.
Nerves, hormones, and medical conditions
Diabetes, pelvic surgery, spinal injuries, and neurologic diseases can affect nerve signals. Low testosterone is more closely tied to low desire but sometimes contributes to ED. Thyroid and other hormone problems may also matter. Low testosterone is not the answer to every erection question.
Stress and performance anxiety
One frustrating experience may create the fear of another. That worry can interrupt arousal the next time. Stress, depression, and relationship tension can contribute, even when physical conditions also play a role. It is not necessarily “all in your head.”
Sleep, alcohol, smoking, and medications
Poor sleep, sleep apnea, heavy drinking, tobacco, and some prescription medications can reduce sexual function. Certain antidepressants and other drugs may play a role. Do not stop prescribed medication without asking your clinician about alternatives.
Porn use and pelvic floor factors
Some men notice different erections during solo and partnered sex. Porn use, habits, anxiety, and expectations may contribute for some men, but there is no proof that porn universally causes ED. Pelvic floor muscles may be weak or too tight; not every man benefits from doing more Kegels.
What matters most
ED often has more than one cause. An assessment should follow your actual symptoms and medical history rather than start with a single favorite explanation.
Explore trustworthy resources
NIH/NIDDK: Erectile Dysfunction · American Urological Association guideline · European Association of Urology guideline
← Back to all articles