The most common causes of pain in the perineum are as follows: first, local inflammatory reaction, resulting in local redness, swelling, heat and pain, so there will be corresponding clinical symptoms, often accompanied by local exudation or increased vaginal discharge, timely examination and treatment is recommended; second, because there is a tumor in the pubic area pressing on the nerve, so it will cause local pain, through gynecological examination or in the Third, whether there is endometriosis lesion, if there is endometriosis lesion, you will often feel pain, especially when you touch it, and this pain will be aggravated when you have menstruation. This is mainly because during menstruation, the endometrium sheds and causes bleeding, and the ectopic lesion also bleeds, so it makes the pain worse.