Standing dizziness is usually orthostatic hypotension - blood pressure dipping as you rise because the body's correction lags a few seconds behind gravity.
Everyday triggers: dehydration, heat, long sitting, big meals, alcohol, hot showers, rising too fast. Medicines are frequent drivers: blood pressure drugs, diuretics, some antidepressants, ED medicines. Occasionally it signals anemia, low blood sugar, heart rhythm problems, or nerve issues. Self-help: hydrate all day, rise in stages, flex calves before standing, never lock your knees. Get checked if it recurs, if you faint, or if it comes with chest pain, palpitations, breathlessness, or black stools. Pymander is a free AI doctor, 24/7 by text, and can help you sort the driver.
What to do
Common questions
Why do I get dizzy when I stand up?
The usual explanation is orthostatic hypotension: when you stand, gravity pulls blood toward your legs, and your body normally tightens vessels and speeds the heart to keep pressure steady to the brain - if that response lags, you get a few seconds of lightheadedness, dimming vision, or unsteadiness. The everyday triggers: dehydration (the most common and most fixable), heat, long sitting or bed rest, big meals, alcohol, hot showers, and getting up too fast. The medication list matters: blood pressure drugs, diuretics, some antidepressants, and ED medicines all do this. Occasionally it points to anemia, low blood sugar, heart rhythm problems, or nerve issues. The self-help: hydrate through the day, rise in stages (sit on the bed edge before standing), flex your calves before rising, and avoid locking your knees while standing. Get checked if it happens often, if you actually faint, or if it comes with chest pain, palpitations, shortness of breath, or black stools - and review medicines with a clinician before changing anything. Pymander is a free AI doctor, 24/7 by text, that can help you sort the likely driver.