Why when I lay down , then get up eveything looks white for like 2 seconds & I feel dizzy but then it goes away ?
It's called a Head Rush :) It's caused by high/low(Cant remember) blood pressure, or youe getting up too fast. I get them too, and so do lots of people- s'normal.
this is severe deficiency of VITAMIN A,, if you will not treated this will leads to NIGHT BLINDNESSTAKE VITAMIN A enrich diet ,,,for example,,,carroots,green leafy vegetables ,,, liver [ if you are non veg] $ supplements of vitamin A
Blood loss to your brain as the blood drains out from standing up, but then your body adjusts for it.
It happens from getting up too fast. I get that too, it's totally normal. :)
When you rise, the brain and vegus nerve tells the heart to compensate by speeding up. Some people don't get this compensation very quickly and have this as a result. In simple terms.