Does chronic cough cause postnasal drip?

Mucus draining from the nose or sinuses can irritate the back of the throat and trigger coughing. Frequent coughing may then leave the throat more sensitive, so the urge to cough continues even when only a small amount of mucus is present. Allergies, a cold, sinus inflammation, dry air, reflux and irritants can produce overlapping symptoms. A sensation of drainage does not by itself identify the cause of a chronic cough.

Drink fluids, avoid tobacco smoke and note whether symptoms change with dust, pollen, strong scents or lying down. Saline nasal rinsing may help some people clear nasal mucus when used with safe water and clean equipment. Follow the product instructions for any nasal medicine, and ask a clinician or pharmacist if you have other conditions or take regular medicines. An assessment can distinguish nasal, throat, reflux and lung contributors.

Book an appointment if the cough continues, disrupts sleep, or comes with persistent nasal blockage, facial pain or wheezing. Seek urgent help for severe breathing difficulty, blue or grey lips, coughing up blood, confusion or chest pain. Prompt assessment is also sensible when symptoms are worsening rather than gradually improving.

Ask whether your nose, sinuses, reflux or lungs need checking, which measures are suitable for your symptoms, and how to use a nasal spray or rinse correctly. Mention any seasonal pattern and all medicines you use.