The presence of positive urine nitrites in women often indicates the presence of a urinary tract infection. The higher incidence of urinary tract infections in female patients is due to the relatively short urethra in women. If sexual intercourse is frequent, it will further increase the probability of incidence, causing urinary tract infections often exhibit certain clinical symptoms. For lower urinary tract infections, it often causes bladder irritation symptoms of urinary frequency, urinary urgency and pain. For upper urinary tract infections, they often cause back pain and systemic clinical manifestations such as chills and high fever. The most common causative organism is Escherichia coli, while others include Aspergillus, Staphylococcus, and gonococcus, among others. The common antibiotics include quinolone antibiotics and cephalosporins. Patients should pay attention to bed rest, improve their own immunity, pay attention to drink more water, urinate more often, women with frequent sex life should pay attention to control the frequency of sex life.