The most common factor is that women suffer from vaginitis, which causes an increase in vaginal secretion, and the vulvar skin is relatively tender, and local skin inflammation will easily occur under the stimulation of secretion containing germs, which will cause vulvar swelling. 2. If women suffer from vulvovaginitis caused by Candida infection, due to the strong itching symptom of the local skin, the patient will keep scratching with her hands, resulting in local skin infection, inflammation, and symptoms such as swelling and pain. 3. The patient will keep scratching and scratching with her hands, resulting in local skin infection, inflammation, swelling and pain, etc. 3, if women do not pay attention to vulvar injury, because the local skin is tender and rich in capillaries, so it is also easy to appear edema symptoms. 4, if women do not pay attention to vulvar cleanliness and hygiene, resulting in the vestibular gland ducts are blocked, resulting in the vestibular cysts, which will cause the vulvar swelling.