Occupational asthma: signs and next steps

Dusts, fumes, vapours, sprays, flour, cleaning products, paints, animal proteins, and other materials can irritate or sensitise the airways. Symptoms may include cough, wheezing, chest tightness, or breathlessness during a shift, after repeated exposure, or later in the day. Some people notice improvement on days away or during leave, although symptoms can persist. Asthma is not proved by timing alone; allergies, allergic rhinitis, infection, or another lung condition can look similar.

Record when symptoms start, what tasks and substances were involved, your work area, and whether symptoms change away from work. Arrange a clinical review and bring any product names or safety information available. A clinician may compare breathing measurements taken at work and away from work, review allergies, and assess whether workplace controls or a different exposure pattern is contributing. Do not stop prescribed inhalers without advice; workplace changes should be discussed with your employer or occupational health team.

Seek emergency care for severe breathlessness, inability to speak comfortably, blue lips, fainting, confusion, or symptoms that continue to worsen despite your prescribed reliever plan. Prompt review is also appropriate when wheezing or chest tightness repeatedly follows a work task, because ongoing exposure can make airway inflammation harder to control.

Ask which workplace exposures could fit the pattern, how to record peak-flow or other breathing changes, whether referral is needed, and what to do during the next episode.