If you have asthma, there are some things you could think about before starting work or changing jobs.

• Many substances at work can make asthma worse or bring on an asthma attack (triggers). These include many types of dust, chemicals and fumes.

• Be aware of your triggers: If cat and dog hairs are one of your triggers, you should think carefully before deciding to become a vet. If you react badly to hair spray, perhaps you shouldn't work in a hairdresser's.

• If you feel you are treated unfairly because of your asthma you may be entitled to protection under the Disability Discrimination Act (2005).