Child Allergies?

Some food allergies remain the same while others get worse over time. My sons peanut allergy went from a rash after eating them to now having asthma attacks with exposure. That is common with peanut allergies, but with some allergies they may only have a sensitivity to it once or it may never really get that bad. I was babysitting a little girl that broke out with a rash after eating a jar of peaches but then 2 months later she got the peaches again and no rash at all.