Discusses the link between suicide & traumatic brain injury. 2 possible risk factors are noted. Firstly, psychiatric disorder, especially depression, is associated with suicidal behaviour. There is evidence that there are high rates of psychiatric morbidity & neurobehavioural problems in those with head injury. Secondly, there are higher rates of suicide in those reporting chronic illness & unemployment. Feelings of hopelessness together with a poor quality of life can contribute towards suicidal behaviour. The author concludes that these findings argue strongly for the importance of identifying & effectively treating depression & anxiety in people with head injury. (4 refs)