My baby has had a pimple/blister sort of thing on his cheek which was red like some insect had bitten.. first 2-3 days it had healed then grew again now again reduced, however it has not gone properly.. likewise he has on forehead too but that is not reddish, but still it is there like a pimple or small blister... it has been there for more than a week.. what do i do?