My son is a thumb sucker and this is the thumb he usually uses.
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I sucked my thumb as a kid and used to get these too. They went away when I stopped
Oo ok. Phew 😅 Sometimes he falls asleep with his thumb in his mouth, so I thought maybe he bit his thumb in his sleep. Or a bug bite.

Same here, I had it when I was younger when I used to suck my thumb, nothing to worry about x

If it forms a ring could be fungal. I’d just keep an eye on it, could be nothing
I have a pediatrician appt this week as well so I’ll run it by him to be sure. Thanks

It may be eczema from thump sucking.