What should you know about consistent cough?

Coughing is a protective reflex that clears mucus, dust, and other irritants from the breathing passages. It may linger after a cold or acute bronchitis even when other symptoms have eased. Allergic rhinitis can cause drainage at the back of the throat, while asthma can cause cough with wheezing, chest tightness, or breathlessness. Acid reflux may irritate the throat and trigger cough, particularly after meals or when lying down. Bronchiectasis can cause a long-term cough with phlegm. These possibilities cannot be separated reliably from the sound of a cough alone.

Notice whether the cough is dry or brings up mucus, when it occurs, what seems to trigger it, and whether fever, wheezing, chest discomfort, breathlessness, or blood is present.

Keep a simple record of timing, triggers, mucus, medicines, and associated symptoms. Drink fluids if you can do so safely, avoid tobacco smoke and strong fragrances, and use a humidified environment if dry air irritates your throat. Do not start antibiotics or use someone else’s inhaler without medical advice. Arrange a clinical assessment if the cough is persistent, keeps returning, disrupts sleep, or is changing rather than improving; a clinician may listen to your chest and decide whether further checks are needed.

Seek urgent medical help for severe difficulty breathing, blue or grey lips, confusion, fainting, sudden chest pain, or coughing up more than a small streak of blood. Seek prompt assessment for breathlessness that is worsening, a high or ongoing fever, chest pain with breathing, or blood in mucus. Children, older adults, pregnant people, and people with a weakened immune system or a known lung condition may need earlier advice.

Ask what causes should be considered, whether your medicines or reflux could contribute, which warning signs should change your plan, and whether you need an examination, breathing test, or chest imaging.