Have the person lie down on his or her back with feet about a foot higher than the head. If raising the legs will cause pain or further injury, keep him or her flat. Keep the person still.
Check for signs of circulation (breathing, coughing or movement). If absent, begin CPR.
Keep the person warm and comfortable. Loosen belt and tight clothing and cover the person with a blanket. Even if the person complains of thirst, give nothing by mouth.
Turn the person on his or her side to prevent choking if the person vomits or bleeds from the mouth.
Seek treatment for injuries, such as bleeding or broken bones.