The possible reasons for frequent urination after intercourse: 1, men or women in the process of intercourse, the urethra and vaginal mucous membrane epithelial congestion, edema, mutual influence, a short period of time can appear frequent urination symptoms, generally no urination pain, urinary urgency and other symptoms, and rest after frequent urination symptoms can gradually disappear. The majority of these are physiological conditions, it is recommended that clinical observation is sufficient and no oral medication or other special treatment is needed for the time being.2. One party has a urinary tract infection, which can be transmitted to the sexual partner after intercourse, and the partner may also have symptoms of infection, urinary frequency, urinary urgency and pain, especially when urinating, the pain in the urethra is relatively obvious. This situation is mostly considered an infection, it is recommended to check the urine routine, if the existence of infection is confirmed, it is recommended to anti-infection treatment. 3, in the process of intercourse there is mucosal damage, can also appear a short time urinary urgency, urinary frequency, urinary pain and other symptoms. If the action during intercourse is too violent, especially for women, they are prone to mucosal epithelial damage and will experience short periods of urinary frequency. In this case, it is recommended to check the urine routine, and if necessary, it is recommended to give anti-infection symptomatic treatment and observe the improvement of urinary frequency.