When urine is red, there are mostly red blood cells in the urine, which is commonly known as hematuria. In light cases, the color of the urine can be normal and must be determined by microscopic examination, called microscopic hematuria; in severe cases, the urine is washed water-like or even blood-colored, called carnivorous hematuria. If hematuria occurs, the following points should be noted in life: 1, should drink a lot of water to reduce salt crystals in the urine, to speed up the excretion of drugs and stones, nephritis has been swollen patients should drink less water; 2, bed rest, should try to avoid strenuous exercise, if necessary, can also take sedative drugs to help sleep; 3, caution or disable drugs that cause hematuria, especially people with kidney disease; 4, can take hemostatic drugs, and can also be combined with vitamin C, etc. If the urine is intermittently and repeatedly red, you must go to the urology department of a regular hospital, because it may be caused by malignant tumor disease of the urinary system, and the treatment may be delayed after a long time.