Best sexologist.Best sexologist.Best sexologist.Best sexologist. Erectile dysfunction (impotence) occurs when a man can no longer get or keep an erection firm enough for sexual intercourse. Having erection trouble from time to time isn't necessarily a cause for concern. But if erectile dysfunction is an ongoing problem, it may cause stress, cause relationship problems or affect your self-esteem. Best sexologist. Best sexologist. Best sexologist. Talk with your doctor about erectile dysfunction, go in for an evaluation. Problems getting or keeping an erection can be a sign of a medical condition that needs treatment, such as heart disease or poorly controlled diabetes. Treating an underlying problem may be enough to improve your erectile dysfunction. If treating an underlying condition doesn't help your erectile dysfunction, medications or other direct treatments may help.