When I stand up sometimes my vision completely blacks out and I usually have to hold on to something because of the dizziness. Recently, when this happens to me the tips of my fingers go numb and tingle. Also, throughout the day I will become light headed get a head ache and become nauseated. Thank you for your help.
Feeling black out while standing from sitting/lying position seems to be a mild type of postural hypotension. And some transient numbness and tingling can happen while this episode. You can try simple method that don't get up suddenly ever. And before standing up, move your feet and calf little so that there is no pooling of blood in your leg veins. If It's severe, you need to undergo some cardiac investigation