What should you know about dry cough?

A cough is a protective reflex that clears irritants from the throat and airways. Dry air, smoke, dust, strong fragrances, and repeated throat clearing can keep the reflex active even after the original irritation has settled. A dry cough may also occur during or after a viral illness such as the common cold or acute bronchitis.

Some conditions present with a dry cough. Asthma can cause cough with wheezing, chest tightness, or breathlessness, while acid reflux can irritate the throat and trigger coughing, often after meals or when lying down. Allergic rhinitis may add sneezing, nasal blockage, or mucus dripping into the throat. A cough lasting beyond the expected recovery period deserves clinical review; persistent cough has several possible causes, including chronic cough, and should not be self-diagnosed from the cough alone.

Sip fluids regularly and try warm drinks to soothe an irritated throat. Avoid smoking and second-hand smoke, and reduce exposure to dust, sprays, and other personal triggers. A humidified room may feel more comfortable, but keep any humidifier clean. Honey may soothe cough in adults and children over one year old; do not give honey to infants under one year. Rest and avoid strenuous activity if coughing is tiring.

Check the label before using an over-the-counter cough product, especially if you are pregnant, giving medicine to a child, or taking other medicines. Do not start antibiotics without an assessment, because many coughs are linked to viral illness or irritation rather than bacteria. A clinician can listen to your chest and decide whether you need tests or treatment for an underlying cause.

Seek urgent medical help for severe difficulty breathing, blue or grey lips, sudden confusion, fainting, or chest pain that is severe or does not settle. Prompt assessment is also needed if you cough blood, develop a high fever with worsening symptoms, or feel markedly unwell.

Arrange a medical appointment if the cough is worsening, repeatedly disrupts sleep, returns often, or continues without a clear improvement. Mention any wheeze, breathlessness, reflux symptoms, allergy symptoms, fever, weight change, or exposure to smoke and workplace dust. Children, older adults, and people with lung or immune conditions may need earlier advice.

Ask: What could be triggering my cough? Do my breathing symptoms suggest asthma or another airway problem? Could reflux or nasal allergy be irritating my throat? Do I need an examination, breathing test, or chest imaging? Which treatments are suitable with my current medicines?