My one year old developed a horrible red diaper rash that seems very painful. She also has very pale stools and I m just trying to see if maybe she has an allergy to something. The rash developed every place the poop touched and she has gotten a similar rash on her face after eating before. She was cleaned up quickly and wasn t sitting in it for much longer than a couple minutes. Could it be a barley allergy? The only thing she ate out of the ordinary was a barley oatmeal and there were only 3 ingredients in it. It was the same thing that I think gave her a rash previously