ds aged 3 has always got a rash on his bottom cheeks (for the last 6 mths). I thought it was eczema, but he has it no where else. He is prone to dry skin all over body though. I keep putting e45 on it, but he is always scratching it and making it sore and bleeding. Isn't he a bit old to start getting eczme now? none of my other children have ever suffered from it. Any advice please? thanks