Does anyone know the real procedure for a bump on the head. My 5 yr old has just been discharged from a 24 hour stay in hospital as he developed extremely alarming symptoms after a bang to the head at school? Turns out even though it was a very nasty bang there was no visible mark in the area of impact so no cold compress was applied. Surely this was the most important thing to do when there is no sign of injury to a known impact site? Also when a mark is visible a wet paper towel is used as a cold compress. Is this really deemed to be of any benefit in reducing swelling and further brain complications?