Male urinary bleeding but no pain may be caused by seminal vesicle adenitis, bladder tumor, kidney tumor and other reasons. 1. Seminal vesicle adenitis: mainly caused by retrograde infection of pathogenic bacteria through the urethra, it will cause edema and bleeding of seminal vesicle glands. When men urinate, the seminal vesicle glands will be stimulated to contract, so that the bloody seminal vesicle gland fluid will be discharged out of the body with the urine, and usually there is no obvious pain, which will lead to the symptom of male urinary bleeding but no pain. 2. Bladder tumor: malignant tumors of bladder can easily cause damage to the bladder mucosa, and the surface of the tumor is prone to necrosis and rupture, resulting in bleeding, and most of them do not have obvious pain in the early stage, thus causing male bleeding in urine but painless symptoms. 3. Kidney tumor: it is an occupying lesion that occurs in the kidney area, on the one hand, it will compress the kidney tissue and blood vessels of the kidney, on the other hand, it will cause damage to the kidney tissue and the mucous membrane of the renal pelvis, which will lead to bleeding, usually there is no obvious pain, which leads to the symptom of male urinary bleeding without pain. If the patient has urinary bleeding but no pain, it is recommended to go to the hospital in time to identify the cause of the disease and then targeted treatment.