However, if you have very severe asthma, your hospital consultant may prescribe a nebuliser. Sometimes hospitals do not have the funding to be able to give you a nebuliser. You may therefore have to buy your own. If you are on a low income and do have to buy one, your nearest Citizens' Advice Bureau will give you information about local sources of money. Everybody's asthma is different and different people have different triggers.
Most people have more than one trigger.
In older people, the symptoms of asthma are less likely to be triggered by allergies such as house-dust mites, furry and feathered pets and pollen. There is no evidence that asthma is caused by air pollution. However, studies have shown that it can trigger symptoms in people who already have it. Those most at risk include people with severe asthma, and older people with heart or chronic respiratory problems. It is very helpful to know what triggers your asthma symptoms and, wherever possible, try to avoid them.