J.V.
I gave my son some ORGANIC cereal the other day and it did the same thing! He had a puffy red rash just where the cereal had touched his chin. I put a cool wash cloth on it and it cleared up pretty fast. A friend of mine has a daughter who gets food related rashes often and she just said that something in the cereal made him sensitive, so hold off on the cereal for a week and reintroduce it...which is good because it was super expensive : ) If he gets rashy again, reintroduce it later, give his body a chance to recognize the food ingredient. She said it was no biggie. Hope this helps!