Blood in the urine may occur as a result of over-exercise, and the corresponding condition is closely related to red blood cell exudation, which can be recovered on its own for the most part. Excessive exercise will cause the bilateral renal activity amplitude to become larger, which further leads to abnormal venous return, causing an increase in osmotic pressure, resulting in red blood cell leakage. In addition, the increased blood circulation during over-exercise leads to an increase in the glomerular filtration rate, which can also lead to a corresponding condition. The combination of the two causes hematuria after excessive exercise, which is a physiologic change that usually recovers on its own. If the hematuria condition after exercise has not been relieved, you need to go to the regular hospital in time for observation, to check for other urological diseases, after diagnosis under the guidance of the clinician to carry out standardized treatment, to avoid delays in the condition.