One large vulva and one small vulva may be due to too strenuous sex, resulting in a vulva of soft tissue damage, so the symptoms of asymmetry. In addition, the vulva one big one small, may be caused by inflammation, can be used externally potassium permanganate sitz bath to promote the absorption of edema, you can take some oral anti-inflammatory drugs, such as amoxicillin, and then with physical therapy, usually need 4-5 days to get better. If there is no improvement after 4-5 days or the symptoms of vulvar a big and a small progressive aggravation, must go to the gynecology department of the regular hospital in a timely manner to further improve the relevant examination, to clarify the cause, choose scientific and reasonable treatment methods, do not delay the condition.