Red blood cells (++++) in urine may be the result of a serious disease or a common disease, and further tests are needed to determine this. When there is a urinary tract infection, there can be a mucosal rupture that causes red blood cells (++++) in urine, which is an ordinary disease that can be completely cured by anti-infection treatment and is not a serious disease. When there are stones in the urinary system, such as kidney stones, ureteral stones or bladder stones, they can also cause the mucous membrane to break down and bleed, resulting in red blood cells (++++) in the urine, which is also a common urological disease and not a serious disease. After extracorporeal shock wave lithotripsy or surgical treatment, the condition can be completely cured. When suffering from tumors of the urinary tract, such as kidney tumors, bladder tumors, etc., there can also be bleeding from the destruction of the tumor itself or bleeding from mucosal rupture, resulting in red blood cells (++++) in the urine. This is a serious disease, because if the tumor is malignant, it can endanger the patient’s life and health and needs to be treated actively.