SHOCK
When a person is injured or under great stress, his circulatory system might not provide enough blood to all parts of his body. That's called shock. A shock victim could have some, all, or none of these symptoms:
Injuries are almost always accompanied by some degree of shock, hut the victim might not be affected right away. Treat every accident victim for shock, even if no symptoms appear. Prompt first aid could prevent shock from setting in.
FIRST AID FOR SHOCK
Never leave an accident victim alone. Fear and uncertainty can increase shock. In a calm voice, assure him everything is being done to care for him. A person who appears to be unconscious might still be able to hear you-keep letting him know you are there.