 Urine may collect underneath the scar, leaving the area under the skin constantly wet, which can lead to infection and the formation of small stones.The opening is larger in women who are sexually active or have given birth by vaginal delivery, but the urethra opening may still be obstructed by scar tissue.Vesicovaginal or rectovaginal fistulae can develop (holes that allow urine or faeces to seep into the vagina).