Blood clots in urine suggest a bleeding condition in the urine. Clinically, hematuria is mostly seen in the following diseases. I. Urinary tract infection. Most combined with urinary frequency, urinary urgency, urinary pain, upper urinary tract infection can be accompanied by chills, fever, routine blood and urine tests to clarify the diagnosis, active antibiotic treatment can be alleviated. Second, urinary tract stones. If ureteral stones or kidney stones are cut through the ureter and kidney, bleeding may occur, and a clear diagnosis can be made by standing abdominal plain film and urological ultrasound. Urinary tract tuberculosis. It can be seen in patients with low immunity, often secondary to pulmonary tuberculosis, and the diagnosis can be clarified by checking tuberculosis antibodies and urological CT examination, and requires active anti-tuberculosis treatment. Urological tumors. Tumors can be accompanied by systemic cachexia, while tumor marker examination can be seen abnormal, it is recommended to actively treat the primary disease.