<s>[INST] Sometimes when I stand up I get dizzy and my entire body feels like there's a buzzing tingling electric sensation. There's also pressure, and a sort of pounding, but it doesn't hurt. My vision starts to go black, and sometimes it goes completely black until I can't see. To make it stop I lie down of just stand still if I don't fall down. A couple times I've fallen down, I wasn't hurt, and it was more collapsing than falling. Sometimes I sort of shake a little, I feel sort of hot and cold at the same time. But when I come back and can see again after I've collapsing, I can vaguely remember getting dizzy, but I don't remember collapsing. I can sort of remember landing on the floor, but it seems like a distant dream that I'm can't remember. I'm only out for a couple seconds at most. The tingling and pounding gradually subside, and the whole incident happens in only a minute at most. [/INST] Hi,Thank you for posting your query.Based on your symptoms, there are two possibilities- syncope and seizure. In syncope, the blood flow to the brain is reduced for a while either because of low BP or a cardiac problem. In seizure, there are abnormal electrical discharges, leading to symptoms.You should see a neurologist and undergo an EEG to further clarify the diagnosis.Please get back if you require any additional information.Best wishes,Dr Sudhir Kumar MD (Internal Medicine), DM (Neurology)Senior Consultant NeurologistApollo Hospitals, Hyderabad,My personal URL on this website:   My email: drsudhirkumar@yahoo.comMy blog: </s>