Source: Mikhail Nilov / PexelsEvery August, some parents watch the school year approach with dread. They have a medical condition that makes a school building unbearable, and most people around them, including many clinicians, do not know it exists. A hallway, a cafeteria, a locker door—the body responds to each as it would to an emergency, and the result looks like school refusal. Children with these conditions hear a prediction as a promise, and a broken promise costs more than not knowing did. Not because we are doing anything wrong, but because that is what an inflamed threat system does.