The color of urine is like tea dark brown, there are two possibilities. One is to drink little water, urine concentration caused by the other to pay attention to whether there is bleeding. It is recommended that a routine urine test can make a preliminary judgment. If there are no red blood cells in the urine routine, it may be caused by concentrated urine, and it is recommended to drink more water and observe whether the color of the urine will improve. If there are red cells in the urine, it may be hematuria. It is important to find the cause of hematuria. Many diseases can cause hematuria, such as urinary tract infection, urinary tract stones, and urinary tract tumors. The most critical thing is to exclude urinary tract tumors because tumor bleeding is the earliest symptom that may occur suddenly or may disappear suddenly, to prevent misdiagnosis with tumors.