What Can Cause Rashes On Face And Forearms?

baby started wiyh upset stomach with some vometing yesterday then today took massive bowel movement hard piece then the rest came out like water .then later he had orange,pineapple,and applejuice cocktail he also had peaches ,and a couple bites of cherry poptart then he stared getting a rash on his face fromears to the rest of face then was