Frequent urination after intercourse is usually associated with physical stimulation, mucosal damage, urinary tract infection, venereal disease and prostate disease.1. Physical stimulation: Because the male urethral orifice is at the front of the penis, and the female urethral orifice is closer to the vagina. So during intercourse, it will stimulate the urethral orifice, which may lead to redness and swelling of the urethral orifice, resulting in frequent urination after intercourse, most of which can be relieved after rest. In this case, it is recommended that patients avoid excessive movements during intercourse, a large number of intercourse or a long intercourse time, to minimize the stimulation of the urethral orifice and thus reduce the phenomenon of frequent urination after intercourse; 2. Mucosal damage: If excessive force is exerted during intercourse, the mucosa may be damaged, which can lead to the occurrence of frequent urination after intercourse. If the patient only has the symptom of frequent urination, it is recommended to observe first, if there is no relief or other discomfort need to promptly consult a doctor. If the patient has frequent urination and vaginal bleeding, it is recommended to go to the hospital in time to find out the cause and take hemostatic drugs for treatment if necessary; 3, urinary system infection: common in women, because women’s urethra and vagina are very close to each other, the surrounding bacteria like E. coli, Staphylococcus aureus, Bacillus deformans, etc. can easily enter the urethra retrogradely and cause urethritis and cystitis, which can lead to frequent urination after intercourse. The frequency of urination can occur after intercourse. It is recommended that patients go to the hospital for routine urine tests in a timely manner. If a large number of white blood cells are found in the urine, the diagnosis is urinary tract infection, and oral quinolone antibiotics should be taken for treatment as prescribed by the doctor. If men and women often have urinary tract infections after intercourse, both sides need to do the corresponding pathogen detection and ultrasound examination to see if both sides have genitourinary system abnormalities; 4, sexually transmitted diseases: especially gonorrhea, non-gonococcal urethritis, according to whether there is a history of unclean sexual contact, do the corresponding pathogen detection. The quinolones, alpha-blockers, M-blockers, non-steroidal anti-inflammatory drugs (antipyretic and analgesic) and other symptomatic treatments can be given as prescribed by the doctor.