Female vulvar pain, redness and swelling are mainly divided into the following reasons: 1, it is likely to be caused by their own diseases, such as sexually transmitted diseases, bacterial infections, viral infections and fungal infections caused by vulvar inflammation. It may also be caused by systemic diseases, such as vulvar swelling infection or diabetes, etc., which can lead to vulvar redness, swelling and pain. 2, it may be related to external factors, if a woman wears too tight underwear, it will make the secretion of mucus in the vagina can not be easily disseminated, which causes vulvar redness, swelling and pain, and will also produce vaginitis over time. Both of these conditions can lead to pain and swelling of the vulva. In addition, some women do not pay attention to personal hygiene during the menstrual cycle and use unclean sanitary napkins or toilet paper, which can also cause this symptom.