What you are describing sounds like orthostatic hypotension. This condition happens when your body position changes rapidly from lying or sitting to standing and your cardiovascular system has not responded quickly enough resulting in temporarily low blood pressure to your brain leading to a presyncopal episode. It can quickly get better after you sit back down, allowing the blood pressure to re-establish. Most often this is due to dehydration leading to low blood volume (i.e. after a long work out without adequate hydration). But it can also occurs in patients with heart abnormalities like arrhythmia (atrial fibrillation, heart blocks), valvular diseases (aortic stenosis), or carotid stenoses. In rarer occasions, adrenal insufficiency or steroid withdrawals can lead to this very presentation. However, these conditions are less common. It is important to get a work up to figure which condition you may have. I would recommend you to follow up with a primary care physician
, letting them know your symptoms. Based on your age, risk factors and a physical exam, they will order specific laboratory tests or imaging. Many of the above conditions are treatable once diagnosed. For example, an arrthymic heart can be controlled by medication or by a pace maker. A stenotic carotid artery can be stented open or undergo surgery
to remove the plagues. Please visit a PCP soon.