The possible causes of pain after ejaculation are: 1, vesiculitis, seminal vesiculitis, can appear pain during ejaculation, and can be accompanied by ejaculation in the semen contains bloody material, appearing hematosperm and other performance. The painful pain in the perineal area or discomfort in the urethra is usually present and requires urethroscopy and routine examination of semen and semen culture to confirm the diagnosis; 2. Infectious lesions of the urethra can also present painful ejaculation. For example, acute urethritis or ulceration of the urethral mucosa can cause pain during ejaculation, which requires routine urinalysis and urethroscopy to further confirm the diagnosis; 3. Tumors and stones of the seminal vesicles can cause painful ejaculation and can be accompanied by hematemesis. Tumors can cause the seminal vesicles to rupture, thus producing pain during ejaculation, and CT examination of the seminal vesicles is needed to further confirm the diagnosis.