Hi....., Fainting.  happens when you lose consciousness for a short amount of time because your brain is not getting enough oxygen.... If he  feel that he is about to faint, lie down, preferably in a position where his head is low and his legs are raised. This will encourage blood flow to his brain.... Treatment for fainting will depend on the type of fainting... In many cases of neurally mediated syncope, no further treatment is needed.....Consult Neurologist....