Residual cough after COVID: what to know

After a viral infection, the airways may remain sensitive. Talking, cold air, exercise, dust, or mucus draining from the nose can then trigger coughing even after other symptoms improve. Reflux can also irritate the throat. A cough may instead point to another problem such as Acute Bronchitis, Asthma, Allergic Rhinitis, or Chronic Cough; the pattern and examination help separate these possibilities.

The presence of a cough does not by itself identify its cause. Tell a clinician whether it is dry or phlegmy, how it affects sleep, and whether breathlessness, wheeze, fever, or chest pain accompanies it.

Drink regularly, avoid smoke and strong fragrances, and use gentle honey or warm fluids if suitable for you. Rest your voice and pace activity while your breathing recovers. Do not start antibiotics or inhalers without advice. A clinician may listen to your chest, review medicines, and decide whether tests or treatment are needed. Consider Acid Reflux or Common Cold information if those symptoms fit.

Seek urgent help for severe breathing difficulty, blue lips, confusion, coughing blood, fainting, or sudden chest pain. Arrange prompt review for a cough that is worsening, accompanied by persistent fever, causes significant breathlessness, or produces new blood-stained or foul-smelling phlegm. People with lung disease, reduced immunity, or a vulnerable household member should seek advice sooner.

Ask whether your cough pattern fits post-viral irritation, reflux, allergy, asthma, or infection; whether you need a chest examination or test; and which warning signs should prompt recontact. Bring a list of medicines and note when coughing is worst.