The most common cause is local inflammation of the vaginal mucosa, which can lead to local congestion and edema, resulting in pain. 2. Ectopic endometriosis lesions in the vagina can also cause pain, especially during menstruation, and can also cause pain during sexual intercourse. 3. Tumors in the vagina can also cause pain. Painful symptoms may occur. If necessary, if endometriosis is suspected, a biopsy can be performed and sent for pathological examination, and the final clinical diagnosis will be based on the clinical pathology, and the corresponding clinical treatment will be given according to the detected cause.