If there are blisters on the vulva, it is usually caused by herpes simplex virus infection, allergic dermatitis or vulvar eczema. 1. Herpes virus infection: mainly due to the body’s resistance to decline as well as sexual contact with the infection, may appear the phenomenon of vulvar blisters, accompanied by a certain degree of peeling, white patches and skin ulcers and other symptoms. 2. Allergic dermatitis: dermatitis can cause severe itching and blisters on the vulva. It is recommended to take oral anti-allergic drugs for treatment, such as loratadine tablets. 3. Vulvar eczema: Eczema is usually painful and itchy, resulting in blisters on the vulva. This is a kind of inflammatory skin disease, mainly using topical medication, serious cases need to consult a doctor. It is recommended to pay attention to improve immunity and hygiene and other issues, if the patient has unclean sex, should be highly vigilant, timely to the hospital, clear causes for treatment, do not blindly use their own medicine, so as not to aggravate the condition.