When feeling faint, grind fingernail into the rescue consciousness point GV 26 Point is one third down from where the nose joins the face to the upper lip – in the groove. This will rescue someone having lost consciousness – just grind in with your nail. Hard.
This means stop them from dying or to rescue them also.
If fainting – can bring them back.

Gv_26 copy      

If also able to, reach the point SP3 (on the foot) and gently massage or attack with strong finger force.

All acupuncture points are in a depression – you will feel a dip – massage very firmly, till the person feels recovered.

If you are on the ground, this is easy, as your foot is right there (if no shoes on).

Sp 3      Sp-3