If there are blisters on the vulva, it may be caused by the following reasons: 1, the more common herpes simplex virus infection, when the body resistance will lead to this viral infection, so there will be blisters on the vulva will cause local itching. When the blisters break, there will be pain, it is recommended that you can use acyclovir ointment to apply to the local and strengthen nutrition in the diet; 2, local allergic reaction to the vulva will also lead to the phenomenon of blisters, for example, if the use of drugs or a new sanitary napkin, so it may lead to allergies, the blister-like changes; 3, may be caused by herpes zoster virus infection, then often accompanied by more serious The pain is often more severe. Then it is advisable to take pain medication and apply acyclovir ointment locally to give antiviral treatment.