I'd guess HFM as well. Can be a few spots or lots. My DD had a mild case, started on her bottom with a few on her cheeks and then a few more on the back of her thighs. They looked like little round bites to begin with, then developed very small pustules in the middle. The DD of a GF had a terrible dose, her entire nappy region was absolutely covered (including inside her vagina) as well as cheeks, hands, feet and back of her thighs. DD actually caught it from her (we think!) so we were grateful to get a mild dose.