The dangers of concussion

It's always unsettling watching a game of rugby and seeing a player take a nasty knock to the head. 

But it's an occupational hazard of nearly all contact sports. Every year thousands of cases of concussion are going undiagnosed and untreated. Playing sport again before you've recovered from concussion can cause long term brain damage.

Nick Rushworth is the Executive Officer at Brain Injury Australia is trying to raise awareness of the dangers of concussion.

Hear Nick speak on ABC Online.