Allergic reaction

So today we found out that the little one is allergic to Amoxicillin. He has been taking it for last 5 days for an ear infection. This morning when he woke up I noticed 3 large bumps on his check, the looked like big pimples. The first thing that came to mind was oh no Chicken Pox. But as time went on he got more and more and the started turning into welts. So into the doctor we went. Poor guy, hope he gets better soon. Luckily the welts haven't been bothering him, at least for now.