A person with head injury requires immediate attention and shifting to hospital. Accidents in general require something called as basic first aid or something like that. We were taught in our workplace about it. You have to see that the person is breathing or not, check his pulse and put him in comfortable position. clean and dress any minor wounds. for bleeding put pressure to stop it. and shift the person as early as possible to the nearest hospital, or in case of head injury or severe accident to a hospital with ICU facility.