The main considerations for prohibiting sex during urinary tract infection are as follows: 1) Sex during urinary tract infection will lead to the aggravation of urinary tract infection in the woman, because the process of sex may bring the bacteria in the vagina to the perineum, and aggravate the urinary tract infection through the retrograde infection. 2) The woman’s vagina and the urethral opening are relatively close to the urethral opening, and in the process of sex, the vaginal irritation will cause the irritation of urethral inflammation, which aggravates the symptoms of urinary tract infection. 3, for men, if the urinary tract infection in the process of sexual intercourse will be ejaculated into the female vagina, will cause female vaginitis as well as aggravate the two sides of the cross-infection. From the above considerations, urinary tract infections during the prohibition of sexual intercourse.