When hematuria occurs after catheterization, the symptoms can be relieved by drinking moderate amount of water, medication and surgery. 1. Drinking moderate amount of water: when patients have hematuria after catheterization, if it is only slight bleeding from mucosal injury, they should pay attention to ensure that the amount of water they drink, which can play the role of flushing the urethra, and prevent blood clots from blocking the urethra. 2. medication: patients in the postoperative hematuria, may be due to infection and other factors, patients can be under the guidance of the doctor to use metronidazole tablets, amoxicillin capsules and other drugs for treatment. 3. Surgery: For patients with large amounts of bleeding or more serious conditions, surgery can be taken to stop bleeding, so as to achieve the therapeutic purpose. After taking catheterization, when pain, bleeding and other discomforts occur, it is recommended to consult a doctor for timely examination, and choose the appropriate treatment under the guidance of the doctor according to the actual situation.