Urinating a urine that is bloody from beginning to end, usually referred to as hematuria, may be some kind of physiological phenomenon, such as consuming foods containing red pigment such as red heart red dragon fruit. It may also be due to the symptomatic manifestation of diseases, such as urinary system infection, urinary system stones, genitourinary system tumors, systemic diseases, etc.. 1. Urinary system infection: after the urinary system infection, in addition to frequent urination, urinary urgency, urinary pain, etc., it may also lead to blood in the urine, resulting in the appearance of urine for the situation of the color of blood. 2. Urinary stones: such as kidney stones, bladder stones, ureteral stones, etc., there may be symptoms of hematuria, blood-colored urine. 3. Genitourinary tumors: such as kidney cancer, bladder cancer, ureteral cancer, etc., may also have hematuria, and the patient will see that the urine is bloody from the beginning to the end. 4. Systemic diseases: such as nephritis, nephrotic syndrome, low platelet, renal vascular disease, coagulation dysfunction, etc., may also cause hematuria. If physiological factors can be ruled out, it is recommended that patients seek timely medical attention and take corresponding therapeutic measures after clarifying the cause of the disease under the guidance of the doctor.