Very uncommon, according to the National Institutes of Health, which estimates that fewer than 5 percent of men in their 20s have ED. In another large-scale survey of 31,000 health professionals between the ages of 53 and 90, only 2 percent reported experiencing ED before the age of 40.
Furthermore, the vast majority of ED among men in their 20s is probably psychological in origin, because most younger men are close to their peak of sexual function and are less likely to have developed the physical problems that often cause erection problems.
According to a FoxNews report, Dr. Jeffrey K. Cohen, a urologist with the Pittsburgh-based Triangle Urology Group, psychological factors are almost always responsible for erectile dysfunction, whether occasional or persistent. Among the factors that may be causing problems are performance anxiety, latent and/or unrecognized homosexuality, death in the family, illness of a child, and financial problems.
Cohen said the second most common cause of ED among younger men is vascular complications caused by diabetes.