It's common - ED affects up to 30 million men in the United States. It becomes more prevalent with age, but can impact men of any age. Knowing it's not uncommon can reduce embarrassment.

It's complex - There are often multiple causes of ED like diabetes, heart disease, obesity, depression, anxiety, etc. A combination of physical and psychological factors are usually involved.

Blood flow is critical - An erection is dependent on healthy blood flow to the penis. Anything that restricts circulation like high blood pressure or clogged arteries can impede erections.

Hormones play a role - Low testosterone can dampen sexual desire and erection response. Stress raises cortisol which inhibits testosterone. Keeping hormones balanced helps sexual function.

The mind-body connection - Erections start in the brain with sexual arousal. Mental health problems or distractions can get in the way. Relaxation helps.

Lifestyle habits matter - Smoking, excessive drinking, obesity, and lack of exercise negatively affect erections. A healthy lifestyle improves sexual health.