Dark tea-colored urine may be caused by concentrated urine or by hematuria in the urine. In this case, we are first advised to drink more water, and then go to the hospital for a routine urine test to observe whether there are red blood cells in the urine routine. If there are red blood cells, it may be that there is hematuria, which should be taken seriously enough. The most worrying thing about hematuria is that there is a tumor in the urinary system, which can be initially determined by doing a renal ureteral ultrasound. Hematuria can also be caused by urinary tract stones or urinary tract infections. For blood in the urine, only after excluding tumors can other diseases be considered. If there are no red blood cells in the urine, the urine is concentrated, drink more water will soon be relieved.