Hello and welcome to HCM.
Thank you for your query.
in that area is normal seen in genital herpes
infection. Before advising any treatment for the same I would like to request you to visit a doctor for the same. If you do have herpes then many more blisters could appear in that area. To rule this out at the earliest or to treat it at the earliest is the best option.
Once the worst has been ruled out, you could start home remedies
I hope I have succeeded in answering your questions, you could write back to me anytime for further clarifications.