Concussion is a temporary disturbance in brain function following an impact to the head. It can also occur after a blow to the body, if the force is transmitted to the head.

Most people associate concussion with sports but they can occur anywhere, even at work or school.

There are many signs and symptoms of concussion, which may present differently between individuals. These include headaches, nausea, vomiting, slurred speech, dizziness, temporary loss of memory, and inability to focus. Loss of consciousness only occurs in around 10% of concussions.

Most people with concussions recover relatively quickly. Around 90% will recover within several days to a couple of weeks.

But sometimes symptoms continue beyond a couple of weeks. When symptoms persist beyond three months, the person may be diagnosed as having persistent post-concussion symptoms.