The urine test is normal but the urine has blood color may be caused by menstruation, diet or drug effects. 1. menstruation: women urine test is normal, but urine with blood, may be in the menstrual period, menstrual blood mixed with urine together with the body, resulting in blood-colored urine, but this is a normal physiological phenomenon, generally do not need to be overly concerned about the end of the menstrual period after the urine can be returned to normal. 2. Diet: Some people eat dragon fruit or other foods with red pigment before doing the test, there can be a normal urine test, but the urine has a bloody performance. This is due to the red pigment can not be metabolized or absorbed by the body, which is also a common physiological phenomenon. 3. Drugs: some people take drugs before the urine test may lead to changes in the appearance of the color of the urine, does not mean that the existence of organic lesions, can also cause the above symptoms. Urine test is normal but urine with blood color may also be caused by other reasons, such as ureteral stones, tumors, etc., should go to the hospital in a timely manner to clarify the cause of the disease, and choose the appropriate method of treatment.