Deep vaginal pain may be caused by injury, vaginal inflammation, endometriosis and other factors. 1. Injury: If the tissues deep in the vagina are damaged due to excessive force during sex or frequent masturbation, the symptoms of deep vaginal pain may occur, which may be accompanied by mild bleeding. 2. Vaginal inflammation: women who do not pay attention to physiological hygiene or have unclean sex may induce vaginitis, when the infection worsens, it will also lead to pain in the deep vagina, accompanied by increased discharge, discharge odor and other symptoms. 3. Endometriosis: If a woman experiences deep vaginal pain during menstruation, the pain is located in the lower abdomen and the middle of the pelvis, and the pain decreases after menstruation stops, she may have endometriosis, which can seriously affect her fertility. There are other causes of deep vaginal pain. If it persists for a longer period of time, it is recommended to consult a doctor for examination and treatment to avoid aggravation of the lesion.