Table of Contents I. Physical Examination II. Ultrasound and Injection Test III. Blood and Urine Tests IV. Psychological Examination V. Treating Erectile Dysfunction Erectile dysfunction (ED) is the inability to have an erection strong enough for sexual intercourse. Common causes of erectile dysfunction may include physical damage, mental blockages, or underlying health conditions. If you are experiencing reduced sexual desire or trouble getting an erection, your doctor may prescribe generic