Women in a reproductive age suffer from endometriosis, from teenagers to women in their 40s and it usually comes with painful and heavy periods. It can be also be genetic. If the pain is severe to a point of it interfering with your daily activities or requires you to take painkillers excessively, it is not normal and could be endometriosis.
Endometriosis is usually diagnosed on laparoscopy (operation looking with the camera inside of the tummy) and treated with hormones or surgery. It most commonly involves your ovaries, fallopian tubes and the tissue lining your pelvis. During Endometriosis, the displaced endometrial cells stick to your pelvic walls and the surfaces of your pelvic organs, such as your bladder, ovaries, and rectum. They continue to grow, thicken and bleed over the course of your menstrual cycle.