Asthma: symptoms, triggers and the value of an action plan

What changes inside the airways

Asthma is a chronic lung condition in which inflammation and tightening around the small airways make breathing harder. Symptoms can include cough, wheeze, shortness of breath and chest tightness. They may be mild or severe, vary from day to day and become more noticeable at night, during exercise or with a respiratory infection.

Other conditions can cause similar symptoms, so wheeze or breathlessness does not confirm asthma by itself. A clinician may consider the history, examination and breathing tests, including how airflow changes over time or after treatment, before explaining what the pattern is likely to mean.

Good control combines medicine, technique and context

Inhaled medicines deliver treatment directly to the lungs. Some open the airways to relieve symptoms, while inhaled corticosteroids reduce airway inflammation and the risk of severe attacks. The appropriate combination depends on the individual. Correct inhaler technique matters because even a useful medicine cannot work well if little reaches the lungs.

Triggers differ between people and may include tobacco smoke, air pollution, dust, mould, pollen, animals, strong scents, workplace exposures, weather changes or infections. The goal is not to fear every possible trigger, but to identify a repeatable pattern and reduce avoidable exposure where practical.

• Ask a professional to watch and check inhaler technique.
• Keep track of night symptoms and activity limitations.
• Notice repeated links between symptoms and exposures.
• Keep an individualized written asthma action plan accessible.

An action plan makes changes easier to recognize

A personal asthma action plan explains usual treatment, signs that control is worsening and what to do at each stage. Severe breathlessness, difficulty speaking, marked drowsiness or symptoms that are not responding as expected may require urgent medical assessment through local services.

This guide is educational only. It does not diagnose asthma, select an inhaler or replace a personal action plan. Medicines should not be started, stopped or adjusted from this article; a qualified healthcare professional can assess symptoms and provide individualized instructions.