Men’s urinary bleeding is mainly caused by oncological diseases, urinary tract infections, urinary stones and other reasons. 1. Neoplastic diseases: If patients suffer from kidney tumor, bladder tumor, bladder tuberculosis and other diseases, the kidney is damaged, which may lead to bleeding in urine. 2. Urinary system infections: patients who suffer from cystitis, pyelonephritis and other diseases with damaged mucous membranes may also lead to bleeding during urination. 3. Urinary stones: If the patient suffers from diseases such as ureteral stones, bladder stones, kidney stones, etc., the stones can damage the kidneys and ureters in the process of moving, which may lead to bleeding in the urine. There are many other reasons for bleeding in urine, you should go to the regular hospital in time for examination and diagnosis, and under the guidance of the doctor for diagnosis and treatment.