what you are describing is called orthostatic hypotension or postural hypotension. a drop in your blood pressure occurs when you go from either lying or sitting to standing. this type of low blood pressure (hypotension) usually lasts only a few seconds or minutes. orthostatic hypotension can make you feel dizzy or lightheaded and may even cause you to faint. mild orthostatic hypotension often doesn't need treatment. many people occasionally feel dizzy or lightheaded after standing and it's usually not cause for concern. the treatment for more severe cases of orthostatic hypotension depends on the cause. orthostatic hypotension can be caused by a variety of conditions including dehydration diabetes heart problems neurological diseases such as parkinson’s disease medications and longstanding high blood pressure in older adults. if you have orthostatic hypotension caused by medications your doctor may change the dose or switch you to a different drug. other treatments include increasing fluids to treat dehydration or wearing elastic hose to increase the blood pressure in your legs. see your doctor to determine whether your symptoms are related to an underlying condition that warrants treatment and if so what treatment is appropriate for you.
when i am sitting and i get up to stand i get dizzy and see spots. why is this? . i am also wondering why a person would be instantly dizzy and have spotty vision when standing up from a sitting position or just while walking.