Sexual intercourse can lead to urinary tract infection, especially unclean sexual intercourse can lead to sexually transmitted diseases. The main site of infection is in the urethra, and the infection can be accompanied by symptoms of frequent urination, urinary urgency, increased discharge from the urethra, itching and burning in the urethra, and in severe cases, elevated body temperature and even other systemic symptoms, such as skin damage or cardiovascular abnormalities, which can be seen in gonorrhea, non-gonococcal urethritis, syphilis, AIDS, etc. Sex between regular partners can also lead to urinary tract infections, such as having sex without local cleaning of the perineum, which can lead to cystitis in women and non-specific urethritis in men. Excessive frequent sex can also aggravate the congestion of the urinary tract mucosa, which can lead to a weakening of the resistance of the urinary tract mucosa, which can lead to urinary tract infections. It is recommended that if you experience frequent urination, urgent urination or difficulty in urination, weakness in urination or incomplete urination after sexual activity, you should go to the hospital in time for examination to clarify the relevant pathogenic bacteria and then undergo early anti-infection treatment.