Endometriosis results from the implantation of functional endometrial tissue, involving both glandular and stromal cells, outside the uterine cavity. Only rarely is endometriosis found at the site of an episiotomy, with the incidence rate of this form of the disease ranging from 0.01 to 0.06% of cases. The physiopathology of this form of endometriosis is believed to be related to the implantation of decidual cells secondary to postpartum lochia and is associated with obstetric surgical procedures. This case report provides a brief review of the literature and describes a clinical case involving a patient with a diagnosis of endometriosis in an episiotomy scar. A retrospective, observational study was conducted by analyzing the patient’s medical records. The clinical manifestations of a nodule suggestive of endometriosis at the site of her episiotomy scar were confirmed as those typically found in endometriosis, with the best treatment option being resection of the lesion.