Erectile dysfunction (ED) is a condition where a man has difficulty achieving or maintaining an erection sufficient for sexual intercourse. It can be caused by various factors, including physical issues like cardiovascular disease, diabetes, and hormonal imbalances, as well as psychological factors such as stress, anxiety, and depression. Lifestyle choices like smoking, excessive alcohol consumption, and lack of exercise can also contribute to ED. The condition can have significant effects on self-esteem and relationships, but it is treatable with lifestyle changes, therapy, medications, or other medical interventions.