If it does, you'll really feel pain or volume in the left side of your top abdomen, which can infect your left shoulder. Endometriosis Endometriosis implants are most commonly discovered on the ovaries, the Fallopian tubes, external surfaces of the uterus or intestines, and also on the surface cellular lining of the pelvic cavity. They additionally can be located in the vagina, bladder, and also cervix. Endometriosis might not generate any signs and symptoms, yet when it does one of the most usual symptom is pelvic pain that worsens just prior to menstruation as well as improves at the end of the menstrual duration. Other signs of endometriosis include discomfort during sex, discomfort with pelvic exams, cramping or pain during bowel movements or peeing, and also the inability to conceive.