A concussion is a mild traumatic brain injury caused by a sudden hit, jolt, or impact on the head or body, leading to rapid movement of the brain inside the skull.

There's growing concern on the future of Springbok's Eben Etzebeth. The 33-year-old suffered an injury two months ago.

Scotland provide Darcy Graham update after ‘freak’ Finn Russell head collision - The winger was taken to hospital after ...

Scotland have been widely praised for refusing to let Finn Russell return to the pitch after suffering a head injury in the ...