Asthma

Asthma can arise at any age but about half of asthmatics develop symptoms before the age of 10 years. It tends to run in families so if there is a family history of asthma or of other allergies such as hay fever or eczema, an individual may be more likely to develop asthma.

Asthma is commonly induced by allergies, particularly to indoor allergens such as those related to house dust mites or pets. In adults who develop asthma for the first time in their 30s, 40s and 50s allergy is much less common and therefore it may not be possible to discern why it has arisen.

In late onset asthma a proportion may have asthma related to exposure to chemicals in their work environment this is known as occupational asthma, and some may be sensitive to chemicals in drugs or their diet as in aspirin sensitive asthma or salicylate intolerance. Salicylates are naturally occurring chemicals that are found in many fruits, vegetables and nuts, however asthma is a very serious condition and you should always consult your GP or asthma consultant when looking at possible contributing factors.