Current knowledge does not allow us to define with certain accuracy the origins and cause of endometriosis, although one thing is certain – it all starts with inflammation, making endometriosis an inflammatory disease.
The most common theory states that it all starts during the menstrual cycle, where some of the endometrial tissue pieces move backwards through uterine tubes into the peritoneal cavity (between the abdominal wall and the membrane surrounding internal organs).
When this phenomenon occurs, the debris transforms into endometriosis, which we call the ectopic endometrium (outside of the uterus), forming lesions that are a source of inflammation and other symptoms.
Read the whole article on the GQC website