If you're among the 10% of women of reproductive age who experiences endometriosis, you're probably familiar with the severe pain during periods, intercourse, and bowel movements (per the World Health Organization ). Endometriosis can also cause problems with mental health , fatigue, bloating, and even fertility.
With endometriosis, tissue similar to the lining of the uterus (called endometrial tissue) grows in other parts of the body. In rare cases, this tissue can be found in the skull bone near the temple and may cause pain in your jaw (the temporomandibular joint, or TMJ). According to a 2023 study in the Journal of Clinical Medicine, women with endometriosis who experienced pelvic pain on one side of the body were also more likely to have jaw pain on that same side. Those with