What could cause blister like sores in the vaginal area?

Herpes: A very common cause of blister like sores in the genital area is a herpes infection. See your family doctor or gynecologist for confirmation and a possible treatment plan.

Herpes: Typical herpes presentation is blister like painful rash in the vaginal area. If that's the case, you need to be seen by a doc to confirm this suspicion and have treatment prescribed. Other than herpes, you may have foliculitis (hair follicle inflammation), which is fairly common as well.