Hello, Thanks for the query.
From your history it looks like an exanthematous rash
, most probably due to the (sore throat
) infection which he had 2 days back. Other things which we should consider is drug rash
or hives. Drug rash is very itchy and you do not give any history of taking medicines prior. Urticaria or hives again is very itchy and it is raised skin coloured to red lesions(wheals) which is not classically blotchy. Exanthematous rash will subside on its own. You may continue calamine lotion.
hope this helped, take care.