Reactive Airway Disease: What It Is and How It's Treated If you’ve ever heard a doctor mention “reactive airway disease” (RAD), you’re not alone in wondering what it actually means. The term pops up a lot, especially when someone—usually a young child—comes in wheezing, coughing, or struggling to catch their breath. But here’s the catch: RAD isn’t a specific diagnosis. Instead, it’s a kind of placeholder doctors use when they see signs of airway trouble but can’t quite pin it down as asthma or another named condition just yet. It’s especially common in emergency rooms or pediatric clinics, where making a rock-solid diagnosis on the spot isn’t always possible. What’s Actually Happening in the Airways? At its core, RAD means the airways are extra sensitive—they overreact to things like pollen, cold air, infections, or even a whiff of cigarette smoke. When that happens, the muscles around the airways tighten up (that’s bronchoconstriction), mucus production ramps up, and the lining ...