Eating spicy food does not cause cystitis. The occurrence of cystitis is usually not related to eating spicy food, but mainly related to pathogenic bacteria infection, chemical stimulation, radiation stimulation, etc. Different causes can lead to different types of cystitis. 1. Pathogenic bacteria infection: such as Escherichia coli, staphylococcus, Klebsiella and other infections, can lead to acute bacterial cystitis; Mycobacterium tuberculosis infection, or Mycobacterium tuberculosis in the kidneys spread to the bladder, can lead to tuberculosis cystitis. 2. Chemical stimulation: chemotherapeutic drugs such as cyclophosphamide will be excreted through the urine, when the urine containing the drug components are stored in the bladder, it will stimulate the bladder and lead to chemical cystitis. 3. Radiation stimulation: it is common in people who need to receive radiation therapy for other diseases, such as rectal cancer, cervical cancer and other radiotherapy, which will stimulate the bladder to have inflammatory reaction and lead to radiation cystitis. 4. Other causes: genetic factors, cold stimulation, autoimmune response, bladder mucosal protective barrier destruction, etc., may lead to interstitial cystitis; urinary tract infection, urinary tract obstruction or functional abnormality, stones and other long-term chronic stimulation will lead to adenohydrocystitis; drug toxicity, viral infections, and so on, and may lead to hemorrhagic cystitis. It is recommended that people with symptoms of cystitis should consult a doctor in time to clarify the cause and diagnosis of the disease, and follow the doctor’s instructions in time for treatment.