If a woman has vaginal swelling and pain, she should consider the following possibilities: first, vaginal inflammation: this is the most common cause. In addition to vaginal swelling and pain, it is often accompanied by abnormal discharge, such as a large amount of discharge, yellow-green or white in color, tofu-like, and accompanied by a foul smell. Secondly, mechanical friction such as trauma or excessive intercourse: it can cause vaginal swelling and pain, if the swelling and pain is not serious, it can be left alone, if it is serious, gynecological examination is needed to deal with it according to the situation. Thirdly, allergic factor: many women may be allergic to condoms, and after each intercourse, they are prone to vaginal swelling and pain. In this case, it is necessary to change the contraceptive method in time and use anti-allergy drugs for treatment. Fourth, tumor: Consider the possibility of vaginal tumor and cervical tumor. Patients may have vaginal swelling and pain, accompanied by abnormalities such as bloody discharge, and need to further improve the examination to determine the specific stage of the tumor and deal with it symptomatically.