The causative organism of cystitis is mostly Escherichia coli, and the medication regimen is based on 3-day therapy and 7-day therapy for uncomplicated cystitis and complicated cystitis respectively. 1. Uncomplicated cystitis mainly refers to women who do not have genitourinary abnormalities per se, have normal immunity and no renal parenchymal disease, and the medication regimen is 3-day therapy, i.e., oral compound sulfamethoxazole for 3 days, furotoxin for 5-7 days, and cephalosporins, amoxicillin, and quinolones for 3-7 days for treatment. 2. Complex cystitis refers to patients with concomitant structural or functional abnormalities of the urinary tract, such as urinary stones, urinary tract malformations, polycystic kidneys, etc. The medication regimen is a 7-day regimen: oral quinolones, cephalosporins for 7 days and then perform a urinary bacterial culture, if it is negative, it is cured, and if it is positive, it is necessary to continue to give antibiotics for 2 weeks. It is recommended that patients with cystitis go to the hospital in a timely manner, under the guidance of the doctor for treatment.