this rash appears a few weeks ago and it was a tiny bit but it grew and it’s been this size for a few weeks now. Doctor checked it out and she said it’s just from drool. But it doesn’t look like a drool rash plus he has one on the back of his neck too?? He also has a yeast infection rash on his neck could it just be that? Or could it be eczema? He has eczema on his cheek. Any advice it’s not going away