Facial Rash More Condition_symptoms How Do I Know If My One Month Old's Facial Rash Warrant A Doctor's Call?

How do i know if my one month old's facial rash warrant a doctor's call? - facial rash more condition_symptoms

My baby has "sharp" is that rash on both ears, under the chin and cheeks. It is not irritating and not red or swollen. I always dry clean my face with warm water and you every time you vomit / vomiting. What could have caused, and there is something to fear?