Health & Safety News Brief
Occupational Health & Safety Information Service
Asthma
Asthma is a serious health problem. Thousands of people in Britain and worldwide have to face the challenges of this disease every day. Symptoms include severe shortness of breath that can stop you from doing the simplest tasks. Imagine not being able to carry your shopping or walk up the stairs or even play with your children. Some sufferers are unable to work again. Other symptoms include:
- Wheezing
- Coughing
- Chest tightness
The symptoms can develop right after exposure to a workplace substance. But sometimes symptoms appear several hours later, possibly at night. This can make any link with workplace activities unclear.
Other associated conditions are:
- rhinitis (sneezing/runny nose)
- conjunctivitis (itchy and inflamed red eyes).
See what happens to the lungs during an asthma attack!
Occupational asthma
Occupational asthma is an allergic reaction that can occur in some people when they are exposed to substances, for example flour or wood dust in the workplace.
These substances are called 'respiratory sensitisers' or asthmagens. They can cause a change in people’s airways, known as the 'hypersensitive state'.
Not everyone who becomes sensitised goes on to get asthma. But once the lungs become hypersensitive, further exposure to the substance, even at quite low levels, may trigger an attack.
The main causes of occupational asthma are set out in Section C of HSE's Asthmagen Compendium.
This list of substances is a useful summary. Also look for the risk phrase R42 ‘May cause sensitisation by inhalation’ on product labels or safety data sheets.
Work-related asthma
Work-related asthma or asthma made worse by work is broader and includes substances in the workplace that irritate the airways of individuals with pre-existing asthma. This includes people who have had asthma since childhood. Respiratory irritants may trigger attacks in those with occupational asthma or pre-existing asthma. Examples include chlorine, general dust and even cold air.
See OHSIS for further guidance and advice and also www.hse.gov.uk/asthma/index.htm