- Inhaled medicines appears less effective than usual.
- Symptoms of cough or wheeze on exertion.
- Night-time wakening with wheeze or cough.
- Fall in the peak flow meter reading (a peak flow meter is a simple device that measures the maximum speed at which a person can breathe out).
When it appears that your asthma is becoming less well controlled, you should consult your doctor for advice on what to do.