What should you know about etiology of orthostatic hypotension?

When you stand, gravity draws blood towards your legs. Normally blood vessels tighten and the heart adjusts its pumping to keep blood flowing to the brain. Dehydration, blood loss, heat, prolonged bed rest, some medicines and heart or nerve problems can interfere. Dizziness, blurred vision, weakness or fainting may follow.

Rise in stages and hold a stable surface. Sit or lie down when symptoms begin. Keep a record of episodes, recent illness, fluid intake and medicines. A GP consultation can review these details and suggest tailored measures. Do not change prescribed treatment or increase salt without advice.

Arrange medical review for repeated dizziness, falls or near-fainting. Seek emergency help after fainting with chest pain, severe breathlessness, injury, one-sided weakness, difficulty speaking or prolonged confusion.

Ask whether a medicine, dehydration or another condition could contribute, how to measure blood pressure safely, and which fluid or activity changes suit you. Discuss fall prevention if episodes occur at night or on stairs.