Shock is a life-threatening condition. It that occurs when the body is not getting enough blood to vital organs. Shock can be caused by problems with the heart, blood loss, a severe allergic reaction, an overwhelming infection or severe damage to the nervous system. Symptoms depend on the type of shock. They include shallow breathing; clammy, pale skin; confusion; weakness; and, eventually, unconsciousness. If you're with someone who goes into shock, call for emergency medical help immediately, according to the National Safety Council. While waiting for help to arrive, perform the ABCs of first aid: clear Airways, check Breathing and maintain Circulation.
Cover the person with a blanket to maintain body temperature.
If the person hasn't suffered any back or neck injuries, lay him or her down and elevate the feet to maximize blood flow to the brain.
Be calm and reassuring.