There are many reasons for vulvar swelling: First, it may be that the vulva is dry. If women excessively use potassium permanganate solution for scrubbing and sitz baths, it may affect the environment of the vulva and lead to dry and itchy vulva, which will lead to vulvar swelling in the long term development. Secondly, it is possible that the vulva is suffering from diseases, such as vulvar eczema or vulvar dermatitis, vulvar acne, eczema, etc., which may lead to vulvar swelling. Third, it may be stimulated by secretions, such as lack of hygiene, stimulated by urine and feces, and not changing underwear or sanitary napkins in time may lead to inflammation of the vulva area by fungus or trichomonas or bacteria. Fourth, it may be stimulated by drugs or chemicals, such as the use of condoms or chemical fiber underwear resulting in allergic reactions.