Doesn't look like eczema to me. I would say heat rash but if it sticks around for a while I'd probably give the pedi a call. I'd also keep the area dry.
this is currently happening to me now. i have them on the back of my legs, my thighs and even my butt cheeks and the more i itch the more i get i put rubbing alcohol to try to lower the itchiness and it works
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Re: Identify this rash!