Cystitis refers to the congestion and edema of the bladder mucosa caused by infections from bacteria, viruses, etc., leading to symptoms such as frequent urination, urgent urination, and painful urination. The presence of blood in the urine indicates that the bladder mucosa has been compromised, possibly involving mucosal rupture, ulceration, or even invasion of blood vessels, resulting in bleeding. This suggests that the cystitis has progressed to a more severe stage and requires timely anti-inflammatory treatment. Treatments might include oral administration of levofloxacin tablets or cephalosporin antibiotics, and if necessary, intravenous antibiotics may be used. During treatment, it is advisable to consume a light diet, avoid spicy and irritating foods, drink plenty of water, and urinate frequently to help flush out negative exudates and blood clots from the bladder.