Why Do I Have a Persistent Dry Cough?
Medically reviewed by Linda Girgis | MD, Girgis Family Medicine on August 20th, 2026.
A persistent dry cough lasting over 8 weeks typically results from upper airway irritation, asthma, or gastroesophageal reflux disease (GERD). Common triggers include viral infections, environmental allergens, certain medications like ACE inhibitors, and postnasal drip. GERD affects up to 40% of Americans and causes stomach acid to irritate the throat and airways. Other causes include chronic bronchitis, lung conditions, or side effects from blood pressure medications. The cough reflex becomes hypersensitive, creating a cycle where coughing irritates tissues further. See a healthcare provider if your cough persists beyond 3 weeks, especially with fever, blood, or breathing difficulties.
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