Yes, yes, yes. I think everyone here nailed it. My LO gets the rash too. And he has eczema. And he is teething. And it is worse after eating meals and having his face wiped. The best thing I have found to put on it is ointment like A and D or Aquaphor. Super messy, but it provides a much needed moisture barrier on his sensitive skin. It's a vicious cycle. The chin seems to be our worst spot. I don't think it hurts him too much, but he sure does hate to have his face wiped.
Good luck!
PS DS1 had Fifths Disease this winter and the characteristic "Slaped Cheek" of Fifths looks completely different from this. I would say this rash is more orange-y almost and tiny little bumps rashy. Fifths looks way more red, way more lacey and truely like someone slapped you in the face.