ive been getting them for years, id lay down of something and as soon as a stood up my vision went black and faded into white and for a few milly seconds i see anything, and it hurts my head and i feel sick. but i got over it, and now i seem to hardly get them, i got them even worse BEFORE i started smoking weed
its just low blood or something.

drink some red wine that thinks your blood out and helps with circulation