Why does endometriosis cause pain during sex?

Endometriosis can make sex painful because lesions and scarring often sit in areas that get stretched or bumped with arousal and penetration—such as the uterosacral ligaments, vaginal fornix, rectovaginal space, bladder, bowel, or the tissue behind the cervix. Deep lesions can create a “mechanical” pain trigger, and adhesions (organs stuck to each other) can pull when the uterus, vagina, and rectum move. Even when penetration isn’t deep, inflammation from endometriosis can sensitize local nerves, so touch that might normally feel like pressure can register as sharp, burning, or cramping pain.

Pain during sex can also persist because the pelvic floor may start guarding in anticipation of pain (sometimes leading to vaginismus), which increases muscle tension and friction and makes penetration feel more painful. Over time, the nervous system can become sensitized, amplifying pain signals even after the original trigger is smaller than it used to be. If painful sex is part of your story, our team focuses on identifying the most likely pain drivers in your specific anatomy and symptoms—then building a plan that can include expert evaluation, targeted excision when appropriate, and coordinated support for pelvic floor and nerve-related contributors so intimacy can feel safe again.