After suffering from cystitis, a definitive diagnosis can be made through routine urine tests, ultrasonography, urine culture, and antibiotic sensitivity tests. Typically, the routine urine test will show a significant increase in white blood cells, possibly accompanied by pus cells, and often an increase in red blood cells as well. Ultrasonography may reveal inflammatory changes such as thickening and roughness of the bladder wall. Combined with the patient's clinical symptoms, such as frequent urination, urgency, painful urination, or even blood in urine, a clear diagnosis can be established. Once the diagnosis is confirmed, it is advisable to promptly treat with antibiotics. Oral antibiotics, such as levofloxacin tablets or cephalosporins like cefuroxime axetil capsules, are commonly used. During treatment, it is recommended to eat a light diet, avoid spicy and irritating foods, drink plenty of water, and urinate frequently.