Postural orthostatic tachycardia syndrome - Wikipedia

Why do I get really dizzy/nauseous after getting up after sitting

If my friend had a sudden blackout episode but blood pressure was

Whenever I get up after sitting for 15 minutes, I get really dizzy

Why does my vision blacken and why do I see colored shapes when I

My little sister suddenly woke up one day unable to walk. We took

Everytime I get up from sitting down, even for a short period, I

Why do my eyes occasionally lose focus for a split second and I

When I stand up too fast after sitting my head hurts and my vision

Why do my eyes occasionally lose focus for a split second and I

Everytime I get up from sitting down, even for a short period, I