Recently a reader posted this question here at HealthCentral.com, saying that her child had results like this: Trees 2++; Grass 4++++. She wanted to know what the numbers mean.

First, let me say that interpreting allergy test results is a tricky business. These tests are notorious for their false positives. That means that the test indicates you are allergic to something, but in fact, you are not. That can definitely be confusing for all concerned!

Types of Allergy Tests

Also, not all allergy...