Many children are taken to a health professional with a complaint about their behaviour. Sometimes it becomes clear that it is not the child who has the problem, but the parent, who may be unable to cope with a strong minded and very boisterous child. Sometimes, as the story unfolds, it becomes clear that the child really does have a problem which causes great distress not only to the child but to all those who come into contact with them. Such children are often labelled as suffering from ADHD (Attention Deficit and Hyperactive Disorder) or one of its satellite disorders - ADD (Attention Deficit), ODD (Oppositional Defiant Disorder), CD (Conduct Disorder). There is no blood test or indeed any test to help make a certain diagnosis of ADHD, it is diagnosed on the symptoms alone and these can be variable. Let’s look at the most common of these.