Blood in urine after running is considered to be exercise hematuria, or it may be chronic occult kidney disease, which is caused by worsening of symptoms after exercise. Normal people usually do not have hematuria after exercise, but if the exercise is too strenuous and the exercise time is too long, the kidneys will be traumatized by the violent vibration during the exercise, which will lead to rupture of the renal blood vessels, and eventually hematuria will occur. In addition, it may also be that the patient himself suffers from chronic insidious renal diseases, such as kidney stones, bladder stones and other urinary stones and glomerulonephritis and other diseases, the sliding of the stones during exercise puncture the local mucosa, or aggravate the original degree of inflammation and infection, then there will be blood in the urine. For patients who have blood in the urine after running, they should pay attention to the strength of the exercise. At the same time, they should go to the local regular hospitals, and follow the doctor’s instructions to standardize the treatment.