My 5 month old lo has been getting a diaper rash on and off for the past month. At first I thought it might have been a reaction from the diapers but because it comes and goes i don't think that's it. I was wondering how common it was for diaper rash to be a sign of a food allergy. He is only on breastmilk at this point but what are the chances that he has an allergy to something that I am eating. And how do I figure it out? Thanks!!