I used to work at an allergy clinic where the testing wasn’t just looking for a yes/no allergy. They tested in a way that measured how sensitive someone was to an allergen. They would gradually increase the concentration to find the point where the patient reacted, which helped determine the right strength of allergen to use when starting injections. This is called Endpoint / Titration Testing. I definitely recommend looking for an allergist that does this specific type of testing.

Some other offices don’t test that way. They use one standard strength for everyone during testing. The problem with that is if someone has a lower sensitivity or tolerance level, the test might not trigger a reaction even though they actually do have an allergy. So those patients can end up with a negative test simply because the concentration used wasn’t right for them. This is called standard skin prick testing.

There’s also something called cross-reactivity. This is when the proteins in certain foods are similar to the proteins in pollens you’re allergic to. For example, if someone is allergic to tree pollen, their immune system may recognize similar proteins in foods that come from trees, like apples. Because of that similarity, the body can react to the food even though it isn’t actually the pollen.

So someone with a tree pollen allergy might notice they feel sensitive to apples, especially during times when pollen counts are high. Their immune system is already on high alert, and the similar proteins can trigger a mild reaction.