what are some common triggers of asthma
Symptom Triggers. Symptom (non-allergic) triggers generally do not cause inflammation, but they can provoke twitchy airways, especially if they're already inflamed. Symptom triggers include: 1  Smoke. 2  Exercise. 3  Cold air. 4  Chemical fumes and other strong-smelling substances like perfumes. 5  Certain food additives like sulfites.