A urine test with 25 units of red blood cells is not serious. Normally, the normal range of the number of red blood cells in a urine test is 0-25 units, indicating a small amount of red blood cells in the urine, which represents a small amount of bleeding in the urinary system. With bleeding it is important to find the cause of the bleeding and treat the primary cause. Regardless of any degree of hematuria, the possibility of urinary tract tumors should be ruled out first, as tumors are usually malignant and can easily lead to progressive worsening of the disease after missing. Ultrasound examination of the kidney, ureter and bladder is recommended to detect the presence of tumors, while ultrasound can also detect the presence of urinary tract stones. A small amount of red blood cells is overwhelmingly caused by infection, drinking more water and taking anti-inflammatory drugs will soon relieve.