Chairman of the General Practice Airways Group (GPIAG) and Somerset GP Dr Steve Holmes, said: 'Taking a good history of the child and testing for a beneficial response to medication are the main treatments used by GPs to successfully diagnose asthma in young children.'
A marked improvement of symptoms and recurrence of asthma when the treatment with medication is stopped is supportive of an asthma diagnosis.
However, diagnosing asthma in pre-school children remains one of the most common problem areas in asthma treatment, said Dr Holmes.
'It is important to pick up the condition as early as possible but not to overtreat because a lot of children will present with wheeze,' he said.
This follows concerns that pre-school children with asthma risk are not being diagnosed if the diagnosis is based on lung function measurements.