The urinalysis usually includes routine urine tests, which include red blood cells, white blood cells and urine protein in urine. Women often find false positive results for red blood cells in the urine during menstruation, and usually positive red blood cells in the urine often represent damage to the kidneys, ureters and bladder. For example, in acute glomerulonephritis, chronic glomerulonephritis, kidney stones, ureteral stones, or cystitis, the urine may be positive for red blood cells. Therefore, women will find red blood cells in their urine during menstruation, which will affect their entry into the workforce, so women should avoid menstruation for their entry physical examinations.