The color of normal urine is transparent light yellow, if you drink too little water or after a lot of sweating the color of the urine will deepen, dark yellow, and some will be dark red, the color of the urine like black tea. To rule out these causes, you can drink more water, eat more fruits and vegetables, consider the appearance of hematuria, the cause of hematuria is urinary stones, infections and tumors. If other pathologies of the whole body are considered, such as rhabdomyolysis, extensive burns, malaria. The urine will also be darker in color, like black tea or soy sauce. With oral drugs, food may also be related, such as oral anti-tuberculosis drugs such as rifampicin capsules, consumption of red dragon fruit during the urine color will be like red tea, is a normal metabolic phenomenon. It can be improved by drinking more water, and the color of urine can be restored to normal soon after the medication and food are stopped.