If blisters appear on the labia, the most common clinical cause is caused by herpes simplex virus infection. The infection caused by this virus is clinically directly related to the patient’s decreased body resistance and immunity, and may also be transmitted through sexual contact. So once this situation is found, it is recommended to do the appropriate laboratory tests. If the laboratory test is positive for herpes simplex virus, you can treat it with acyclovir ointment for 5-7 days, and strengthen nutrition in the diet, and the symptoms will basically disappear. The blisters on the labia may also be caused by a local allergic reaction, which may be caused by a new change of underwear, a new brand of sanitary napkin or a certain drug used to treat the vulva, allergic reactions may occur and local blisters and itching may occur. It is recommended that anti-allergy treatment be combined with clinical history, such as treatment with mometasone ointment applied to the local area.