The cough reflex explained

Sensors in the throat and breathing tubes detect mucus, particles, fluid or chemical irritation. Nerves carry that signal to the brain, which coordinates a deep breath followed by a forceful burst of air. This can move material towards the mouth. After a cold, the sensors may remain sensitive, so speaking, laughing, cold air or perfume can trigger coughing. Asthma, Acid Reflux, Allergic Rhinitis and other airway conditions can also stimulate the reflex.

Sip water, avoid smoke and strong fragrances, and use a calm nasal inhale followed by a slow exhale when a tickle starts. Treating nasal congestion or reflux may help when those problems are contributing, but the right treatment depends on the cause. Do not repeatedly force a cough to clear a dry tickle, because this can further irritate the throat. Write down when episodes happen and what was present just before them.

Book an assessment for a cough that persists, interrupts sleep, limits activity, or comes with wheeze, hoarseness, swallowing difficulty, fever or chest discomfort. Get urgent help for severe breathlessness, blue lips, confusion, fainting or coughing blood. A clinician may examine your nose, throat and chest and decide whether breathing tests or treatment for an underlying trigger is appropriate.

What triggers seem most relevant in my case? Could reflux, nasal drainage or asthma be involved? How can I interrupt the cough safely? Do I need tests, and what warning signs should I watch for?