 The aetiology of persistent post-concussional symptoms is only partly elicited, and no consensus exists whether post-concussional symptoms constitute a true syndrome linked to neurobiological disturbances caused by accident or head trauma. Nevertheless, the term post-concussional syndrome is widely used to describe a set of persistent somatic and emotional symptoms often observed in concussed individuals. We use the abbreviation PCS as a purely descriptive term for post-concussional symptoms. The literature suggest, that PCS are best understood in a complex, multifactorial model, where both biological and psychological factors contribute to persistent symptoms and associated disability. Moreover, PCS overlap considerably with symptoms of other trauma-related conditions such as whiplash-associated disorders and post-traumatic stress disorder. On this background, a number of trials have tested the effect of various psychosocial interventions, including cognitive behavioural therapy CBT, on persistent PCS. Although preliminary, there is some promising evidence that treatment based on the cognitive-behavioural model may be effective in treating PCS and prevent permanent suffering and disability. 