The symptoms of chemical cystitis are as follows: 1. urinary tract irritation symptoms, mainly manifested as urinary frequency, urinary urgency and painful urination, often due to exposure to chemical drugs directly perfused bladder mucosa, and the bladder mucosa rupture, erosion and other changes, so there will be corresponding urinary tract irritation symptoms. 2. carnal hematuria, chemical cystitis with urinary tract mucosal erosion, this can appear mucosal oozing blood, blood mixed in urine. The symptoms are often severe, especially when holding urine or during urination. 4. Increased body temperature, when chemical cystitis is not cured for a long time, it can cause fever. The patient will have an elevated body temperature and may even have chills with elevated body temperature or infectious shock.5. Decreased bladder capacity, chemical cystitis forms bladder contracture during the healing process, resulting in a decrease in bladder capacity, most directly leading to frequent urination, as the amount of urine stored in the bladder decreases, so the frequency of urination increases accordingly.