Epsom salt bath opinions?

Br

I gave my toddler a bath last night and we used Dr teals lavender sleeping bubble bath (we ran out of our regular bubble bath) and that night he threw up in his sleep and we rinsed him off and he threw up a little bit more again that night. And I gave him a bath again this morning in the same bath and a couple hours later he pukes again after the bath and his face and neck started irritating and became itchy. He’s not sick he’s not acting sick AT ALL so all I can think of is the bath is the issue! Has anyone else had this problem?

More upsetting part of all this is that it’s his birthday today 😔