During pregnancy, if the cystitis attacks and causes pain, you should first go to the urology department for a medical examination and routine urine test. If white blood cells or white blood cell esterase are found positive in routine urine test, urinary system infection really exists, and oral antibiotics are taken for treatment. Cephalosporins can be selected as antibiotics. Cefaclor is taken orally for five days. During this period, drink more water and urinate frequently, which is conducive to the control and cure of cystitis symptoms. After treatment, patients still need to drink more water and urinate frequently to prevent recurrence of cystitis. The pain is not severe, just drink more water and urinate frequently. If there is no urinary system infection, oral antibiotics are not required. Antibiotics are only required for treatment when it is confirmed that there are obvious cystitis irritation symptoms, leukocytosis, and bacterial infection. Generally, it can be cured without excessive worry.