After suffering from cystitis, patients will exhibit symptoms such as frequent urination, urgent urination, and painful urination. In severe cases, there may be blood in the urine, pus in the urine, pain in the lower abdomen, and even symptoms such as chills and high fever. It is important to go promptly to the hospital's urology department, where tests such as routine urine analysis, urine culture and sensitivity tests, blood tests, and ultrasound examinations are performed to make a clear diagnosis. Routine urine tests often indicate a significant increase in white blood cells, and sometimes red blood cells are present as well. Ultrasound examinations typically show thickening and roughness of the bladder wall. In cases of certain special types of cystitis, such as considering interstitial cystitis or glandular cystitis, it may also be necessary to observe the bladder under cystoscopy, and if necessary, take a biopsy for pathological examination to confirm the diagnosis.