Unconsciousness or insensibility is due to interruption of the action of the brain due to certain causes it is an important indication, not only of disease or injury to the brain but also of many serious injuries or diseases of other parts of the body.

Before losing consciousness, the victim may complain of...
  1. Lightheadedness.
  2. Weakness.
  3. Nausea.
  4. Skin may be pale and clammy.

If a person begins to feel faint, he should...
  1. Lean forward.
  2. Lower head toward knees.

As the head is lowered below the heart, blood will flow to the brain.

What to do if someone becomes unconscious:

The recovery position.
  1. Keep the victim lying down with head lowered and legs elevated.
  2. Loosen any tight clothing.
  3. Apply cool, damp cloths to face and neck.

In most cases, the victim will regain consciousness shortly after being placed in this position. After the victim regains consciousness, do not let him get up until you have questioned him (Who are you? Where are you? Do you know what day it is?) to be sure he has completely recovered.