Why does your blood pressure drop when you stand? Understanding Orthostatic Hypotension, causes, risks, and management tips

That sudden wave of dizziness or lightheadedness after rising from a chair or bed is something almost everyone experiences at some point. For most, it lasts only a few seconds and resolves on its own. But for some people, blood pressure can drop sharply and remain low for a minute or more after standing. This condition, known as orthostatic hypotension, can be more than just uncomfortable—it increases the risk of falls, injuries, and long-term complications, especially in older adults.As reported by Harvard Health, orthostatic hypotension becomes increasingly common with age and frailty. While often overlooked, it affects about one in ten people with high blood pressure, a condition that itself is widespread among older adults. With nearly three out of four people over the age of 60 showing blood pressure readings above 130/80 mm Hg, the overlap between high blood pressure and orthostatic hypotension is significant.The mechanics are straightforward but delicate. When a person stands up, gravity pulls blood downward into the legs and abdomen, creating a sudden shift in circulation. As a Harvard Health study stated, this shift briefly reduces the amount of blood returning to the heart and, in turn, decreases the supply of oxygenated blood to the brain, which can temporarily impair alertness and balance. Normally, specialized pressure sensors in the arteries of the neck and near the heart detect this change almost instantly. They trigger a reflex that tells the heart to beat faster and the blood vessels to tighten, pushing blood upward to restore balance and maintain proper brain function.As people age, these sensors may lose sensitivity. The body’s corrective response slows, and blood pressure remains lower than it should be for longer than usual. This lag in response explains the dizziness, unsteadiness, and even fainting some people experience upon standing, making older adults more vulnerable to falls and related injuries.Other common causes include:Orthostatic hypotension can affect anyone, but some groups face a higher risk, including older adults, individuals with diabetes, heart disease, neurological disorders, or those taking certain medications that influence blood pressure regulation.While the condition can be unsettling, there are effective ways to manage and prevent complications.*Disclaimer: While often dismissed as a minor inconvenience, orthostatic hypotension can carry serious health risks if ignored. Its connection with ageing, chronic illness, and medication use makes it especially relevant in older populations. By understanding the underlying causes, recognising risk factors, and adopting preventive strategies, people can significantly reduce symptoms and protect themselves from complications. With medical guidance and lifestyle adjustments, it is possible to manage this condition and maintain better heart and brain health.Also Read | 10,000 steps a day vs Japanese interval walking: AIIMS gastroenterologist reveals a more effective way to improve blood pressure and heart health