Urethral bleeding after intercourse may be caused by urethral injury, urinary system inflammation, urinary system stones and other factors. 1. urethral injury: if the action is too big, too hard, causing male or female urethral mucosal injury, urethral bleeding symptoms after intercourse. 2. urinary system inflammation: if the two sides do not pay attention to the pubic hygiene before intercourse, it may cause reproductive tract infection, which is manifested in urethral bleeding. 3. urinary stones: if you suffer from urethral stones, bladder stones, stone movement will continue to stimulate the urethral mucosa, urethral bleeding symptoms may occur after intercourse. Both men and women should keep the pubic area clean before intercourse, intercourse should be gentle, menstruation, pregnancy, illness should be prohibited during the period of coitus, patients with urethral bleeding after coitus, should be timely to the regular hospital, under the guidance of the doctor’s treatment.