Endometriosis is a frequent gynecological, chronic and inflammatory disease characterized by implants of endometrial tissue outside the uterus. Rarely, endometriosis can be located in the abdominal cavity as endometriomas. Endometriosis causes chronic pelvic cyclic pain, and infertility in a high percentage of cases of women who suffer from it. To date its etiology is unknown and several theories have been proposed, because none of them can explain the different types of endometriosis. Treatment is complex and is based on non-invasive and invasive methods. The objective of reporting this case is to bear in mind the diagnosis of endometriosis when detecting any palpable painful mass in the abdominal wall in women of childbearing age, since this location is very rarely observed in the field of dermatological surgery.