What should you know about nasal drip causing cough?

Post-nasal drainage may feel like a lump, tickle or film in the throat. It can lead to repeated swallowing, throat-clearing, hoarseness and a cough that changes with position. Allergic Rhinitis and the Common Cold often increase drainage. Acid Reflux can create similar throat symptoms without extra mucus. Bronchitis, Asthma or Bronchiectasis can cause cough independently, so nasal symptoms do not identify the cause by themselves.

Try a saline spray or rinse, drink enough fluids, and reduce exposure to smoke, dust and personal triggers. Raise the head of the bed if symptoms are worse after lying down, and consider reflux triggers such as late heavy meals. Use medicines only as directed; a clinician or pharmacist can advise whether an allergy treatment is suitable and whether a nasal spray technique is correct.

Book a review for a cough that lasts, recurs frequently or interferes with sleep or activity. Prompt assessment is needed for fever that does not settle, wheezing, breathlessness, chest pain or thick or blood-stained mucus. Get emergency help for severe breathing difficulty, blue lips, confusion or coughing blood in a large amount.

Is the cough likely to be driven by nasal drainage, reflux or the lungs? Would allergy testing or a chest assessment help? How should I use a saline rinse safely?