I noticed a rash on my 2 yr old daughter around both her ankles. It just looks like small clusters of bumps just skin-like not rough or anything different but both ankles were red. I put calamine on them and put her to bed, then woke up with her about an hour and a half later with new clusters, on her feet, up her legs, on her belly and the original ones pretty much gone. I m keeping calamine on them and gave her a dose of zyrtec since benadryl says she s too young to take that. I haven t changed detergents or done anything differently today that I can think of to bring this on. I checked everywhere for may be ants getting on her before bed, checked the sheets and all just in case and noticed nothing. Any idea what it could be and if it s serious ?