Thanks for writing to us.
You might be having an allergic reaction
to some product.
Wash the areas several times with fresh water. Do not use any cosmetic products at the sites.
lotion at the site of the lesions and see if it helps. He could take some oral antihistamine medications like cetrizine
. He need to maintain a good personal hygiene . Wear lose comfortable clothes. Wash all your linen and towels etc with a disinfectant solution.
I do hope that you have found something helpful and I will be glad to answer any further query.