Hi, In March 2016 I was in the supermarket. I turned around from an aisle and it was like a switch in my head had been flicked I was suddenly severely lightheaded, spaced out, suffering from depersonalisation. I have had this lightheadedness for 16 months, without a day's break. It's like being extremely lightheaded, I guess similar to being drunk or feverish. Sometimes I feel very depersonalised and I feel as though I am looking at the world through a wide-angled lens. My perspective seems somehow to have altered, like I am detached from it. This ranges in severity from day-today (I feel worse in bright light, under supermarket lights and often in heat as well) but is always there-standing, sitting and lying. I have had episodes of low blood pressure-but this lightheadedness is always present, even when my blood pressure is fine. Sometimes the lightheadedness makes me feel faint and headachey. I have mild macrocytosis but the hematologist assured me this wouldn't be responsible for my lightheadedness. I was B12 deficient last year (stomach issues + 31 years as a vegetarian)-and have been on daily injections for a year. I initially attributed my lightheadedness to the B12 deficiency - I also suffered from dizziness which did more or less clear up after a few months of injections. The lightheadedness remains. I am still not sure if a severe B12 deficiency isn't responsible. My ferritin, vitamin D and thyroid have all come back fine. Increasing liquid and salt and using compression stockings hasn't helped. Does anybody else have this? What do you attribute it to? I guess it's a neurological symptom but wondering about root cause and possible treatment/management. Thanks for sharing thoughts and suggestions!