Alright mommas what is this rash?

J

I've never ever had to deal with more than a bit of redness on my son's bum. Today this redness popped up around his chin/lips and he's also getting bright red right between his little cheeks which usually would go away overnight but hasn't for a few days. Anyone have any ideas what this might be on his face? I don't think or know if the two would be related. TIA I'm a FTM and my son is a 10 months on the 20th

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