The perineum is not on top of the penis. Common causes of perineal pain include reproductive system infections, urinary stones, and localized perineal injuries. 1. Reproductive system infections: common reproductive system infections such as chronic prostatitis, which is caused by a variety of causes of chronic inflammation of the prostate tissue, the patient will have frequent urination, urinary urgency, urinary pain, urethral burning, pain, swelling or discomfort in the perineum. 2. Urinary stones: patients with bladder stones, urethral stones, due to the stone will irritate the urethral mucosa, patients may experience urethral pain and discomfort, the pain will also radiate to the perineum, perineal pain. 3. Localized perineal injuries: localized perineal injuries can also cause pain, such as sexual intercourse or violence caused by external stimuli. Male genitals are important organs of men, once found abnormal genitals, or perineal pain, should be timely to the hospital urology or male department to avoid adverse effects.