If we were to sum up allergies with an emoji, it’d be a shrug. We know so little about them, and yet tens of millions of Americans experience allergies of some kind or another throughout their lives. They come. They go. They evolve slowly or shift rapidly. Perhaps the only constant is that they’re becoming more common.

But there is some positive news for allergy sufferers everywhere.

“The only good thing about getting older is that​,​ in many cases, allergies are less prevalent,” says Clifford Bassett, medical director of Allergy & Asthma Care of NY and an allergy specialist at New York University. Changes inside and outside our bodies as we age affect the way we react to potential irritants from ragweed to crab to dogs. Why? Well, that’s a little more complicated, and there’s more than one possible reason that your allergy status just switched.

Read More: https://www.popsci.com/why-allergies-change-age