Hello,
Allergic contact dermatitis,
shingles, dermatitis (poison Ivy),
herpes, or
dyshidrotic eczema. Take care of your hygiene, take bath regularly. You should clean your room where you are living to clear it of bugs, insects, etc. Wash your clothes in hot water and put the bed mattress in sunlight to disinfect it.
Always wear cotton clothes and avoid sharing toiletries with anyone. Wear loose fitting cotton clothes, do not wear synthetic or nylon fabric. To avoid itching you can take antihistamine, one orally, at bed time for 5-7 days. To get rid of itching apply
hydrocortisone ointment on the area affected. You should get clinically examined by a
dermatologist as it is recurring. Get STD tests done to detect herpes or any other STI.
Your doctor may also take the blister's tissue sample or culture of the blister to send to the lab. If report is positive you will be treated with antivirals and antibiotics. You should apply
acyclovir ointment on the affected area for relieve. You are suggested to avoid touching, picking or scratching it. it may spread the infection. Avoid any type of sexual activity till you get better.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Nupur K., General & Family Physician