When a person is about to faint, he becomes dizzy, turns pale, and feels weak. He may or may not become unconscious.
The best way to avoid fainting is to lower the head between the knees for about five minutes. If the person still feels dizzy, have him repeat the head-lowering.
If the victim is unconscious, loosen his clothing, and see that he gets plenty of fresh, cool air. Place smelling salts or a few drops of aromatic spirits of ammonia under hes nose until he revives. If he does not regain consciousness within five minutes, call a doctor.