Have the person lie down. If there is an injury to the head, neck, or chest, keep the legs flat. Otherwise, raise the person's legs at least 12 in. (30 cm).
If the person vomits, roll him or her to one side to let fluids drain from the mouth. If you think the person might have a neck or back injury, gently roll the person's head, neck, shoulders, and body together as a unit (logroll).