where doctors conducted a physical examination and a brain scan. They found a swelling on her head, but her brain appeared normal, allowing her to be discharged.
if a blood vessel in the brain has ruptured bleeds slowly it may be many hours before the build up of pressure produces any symptoms or can be seen on scans or x rays, thats why patients should be hospitalised and kept under observation for at least 24 hours after even a suspicion of concussion.