The following causes are common in the vulva: 1. allergies to certain drugs that cause blisters in the vulva, often with a history of adverse drug exposure, can lead to this condition. 2. caused by herpes simplex virus infection, many small blisters will grow in the vulva, and local pain will occur after the blisters rupture, and local itching will occur before they rupture. 3. caused by herpes zoster, when When herpes zoster is contracted when the body’s resistance decreases, it will cause severe pain in the vulva and blister-like tissue will be found in the area. It is advisable to give antiviral treatment clinically and to enhance nutrition to improve body resistance so that the disease can be cured as soon as possible.