A puerperant is 32 years old, it's her first childbirth, term precipitate labor, the III period is unremarkable, the uterus is contracted, tight. Examination of the birth canal revealed a rupture in the left posterior vaginal wall that was closed with catgut. Two hours later, the patient complained of a feeling of pressure on the anus, pain in the perineum, minor vaginal discharges, edema of the vulva. These clinical presentations are indicative most likely of: