Erectile dysfunction (ED), also known as impotence, refers to the inability to achieve or maintain an erection that is firm enough for sexual intercourse. It is a common condition that affects men of various ages and can have physical or psychological causes. Physical causes may include underlying health conditions such as cardiovascular disease, diabetes, hormonal imbalances, or nerve damage, while psychological causes may involve stress, anxiety, depression, or relationship issues. Treatment options for erectile dysfunction may include lifestyle changes, medications, counseling, or other interventions depending on the underlying cause and individual circumstances.