The following pain in men may be caused by: first, balanitis, which can cause pain in the foreskin and glans of the external genitalia, accompanied by local erosion, local exudation or erythema, secretion, etc. Physical examination and etiological examination are required, and anti infection treatment is required after diagnosis. Second, urethritis or cystitis can cause pain in the urethra or lower abdomen when urinating, accompanied by frequent urination, urgency, incomplete urination, and even fever in severe patients. Routine urine test and urine culture are needed for further diagnosis. Third, there is orchitis and epididymitis, which can lead to scrotal pain, accompanied by scrotal swelling, skin swelling and other changes. B ultrasound examination and blood routine examination of scrotum are required, and anti infection treatment is given after diagnosis. Fourth, there is a local allergic reaction of the penis, which can cause pain in the penis body, accompanied by local rash or wheezy changes, accompanied by severe itching symptoms. Most of them are caused by contact with allergens or oral administration of some drugs, so anti allergy testing is required. After anti allergy treatment, the pain can be alleviated.