Whether or not the erythrocyte 20/μl is normal depends mainly on the cause of the erythrocytes in the urine. If it is caused by physiological reasons such as strenuous exercise, or improper retention of urine, it is usually normal and does not require special treatment; if it is caused by pathologic reasons such as glomerulonephritis, urinary tract infections, stones and so on, this situation may not be normal, and further examination and treatment are required. The normal range of quantitative examination of erythrocytes in urine routine is 0~5/ul, so 20 erythrocytes/ul in urine routine indicates that the erythrocytes in urine are high. High erythrocytes in urine can be seen in physiological causes and pathologic causes two categories. Physiological causes such as mental stress, strenuous exercise, or due to improper retention of urine, such as not correctly take the cleaner mid-stream urine, or women are in the menstrual period, can lead to the presence of red blood cells in the urine test, the above situation is normal, no special treatment. If the pathological reasons such as glomerulonephritis, urinary tract infection, stones, etc., the urine test may appear red blood cells. At this time is not normal, need to actively treat the primary disease, improve the symptoms. Red blood cells in the urine may also have other reasons, it is recommended that patients go to the regular hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.