UPDATE : What’s this on my baby?

Kathie ✨

He’s teething and he’s been having lots of diarrhea. He just threw up and this rash started

Any ideas ? It’s all over his back and face

UPDATE : I went to the ER and they told me that since he threw up he strained himself and that’s why he got that rash. And It could be because of the teething. Thank you all for your concerns (: