Any ideas?

I’m just posting because I have no clue what these are.

They appeared like a week ago and there’s two on each thigh, one on my left arm and one on my hip. The ones on my thighs sometimes itch/burn (the ring’s you see around the one are from the bandaids I was wearing to stop them from rubbing against my pants, I’m allergic to bandaids but I couldn’t stand the burning)