This kind of injury needs physical examination by nearby dermatologist/ surgeon. The depth of skin and soft tissue damage has to be judged. That decides further course of treatment. For superficial burns- local creams will help. For deep burns- oral antibiotics, dressings are needed. Genital area normally has many bacterias- there is high chance that the wounds might get infected. Chance of scarring, stricture formations are high too.
Next Steps
Please do see nearby dermatologist/ surgeon as soon as possible.
Health Tips
Do not try to break the blisters. Do not try home remedies. Timely medical care is the key for best long term outcome.