Blood pressure drops when you stand up

If your blood pressure drops when you stand up, gravity may be briefly pooling blood in your legs before your body compensates. A brief change can happen without a serious problem, but repeated lightheadedness, blurred vision, weakness, or fainting can point to orthostatic hypotension. The cause may involve dehydration, illness, a medication effect, or the nervous system, so a pattern is worth discussing with a clinician. Do not change a prescription on your own.

What happens when you stand

Standing shifts blood toward the lower body. Blood vessels normally tighten and the heart adjusts its rate to keep enough blood moving to the brain. If that response is delayed or insufficient, pressure may fall and symptoms can appear. The medical term is orthostatic, or postural, hypotension.

Clinicians commonly define classic orthostatic hypotension as a sustained fall of at least 20 mmHg in systolic pressure or 10 mmHg in diastolic pressure within three minutes of standing after lying down. A reading is only one part of the picture: the timing of symptoms, how the measurement was taken, and the person’s usual pressure matter. Different patterns can occur immediately after standing or later, and a standard cuff may miss a very brief early dip. Wieling and colleagues describe these patterns and the need for careful history and supine-to-upright measurements.

Symptoms often include lightheadedness, dim or blurred vision, weakness, nausea, or a feeling that you might pass out. Some people have falls or slowed thinking rather than a clear dizzy spell. Symptoms that start after standing and ease when sitting or lying down are especially useful to report. A symptom can have causes besides a blood pressure change, so it should not be self-diagnosed.

Warning signs: when to get help

Call 911 for fainting with chest pain, severe shortness of breath, new weakness or numbness, trouble speaking, or a sudden vision change. Fainting or chest pain in the setting of low blood pressure needs urgent care. These symptoms can signal an emergency, regardless of whether a home cuff shows a low number.

Arrange prompt medical care for repeated fainting, a fall with injury, symptoms that are worsening, or new episodes alongside a fast or irregular heartbeat. Contact a clinician soon if standing symptoms keep recurring, interfere with walking, or began after a new illness or medication change. New or worsening symptoms deserve medical care. If you also measure a pressure of 180/120 mmHg or higher, repeat it after a short rest; with chest pain, breathing trouble, back pain, numbness or weakness, vision change, or difficulty speaking, call 911.

What causes blood pressure to drop when you stand up?

There is no single cause. Fluid loss from vomiting, diarrhea, fever, sweating, or simply not drinking enough can reduce circulating volume. A long period in bed, a large meal, alcohol, or standing still for a long time can also contribute in some people. Anemia, heart rhythm or pumping problems, and conditions affecting nerves that regulate blood vessels may be part of the picture. These are possibilities for a clinician to consider, not a checklist for diagnosing yourself.

Medicines can contribute, including some used for high blood pressure and medicines prescribed for other conditions. The American Heart Association statement on orthostatic hypotension in adults with hypertension says the relationship is complex: high blood pressure and orthostatic hypotension can coexist, and some drug classes may reveal an underlying problem with automatic blood pressure regulation. The statement recommends characterizing patterns and triggers, reviewing medications and other aggravating factors, and tailoring care. It does not support stopping blood pressure treatment without medical guidance. Read the AHA scientific statement.

This is why “hypertension orthostatic” is not a contradiction. A person may have high pressure while seated or lying down and experience a drop on standing. Managing one reading in isolation can miss the pattern. Tell your clinician about both high readings and upright symptoms, and bring a log if you have one.

How clinicians check it

A clinician may ask when the symptoms occur, how long they last, whether meals or activity trigger them, and what medicines or supplements you use. They may measure blood pressure and pulse after resting flat and again after standing, sometimes repeating readings over several minutes. Depending on the history, an exam, blood tests, heart rhythm assessment, or other testing may help identify contributors. A review focused on older adults describes this assessment and the challenge of orthostatic symptoms alongside high pressure when lying down.

If you check at home, record the time, posture, blood pressure, pulse, symptoms, recent meal or illness, and medication timing. Use a properly fitted upper-arm cuff and follow its instructions; a single number from a wrist device or immediately after movement may be hard to interpret. Do not repeatedly stand if you feel you may faint. Bring the readings to your clinician rather than trying to establish a diagnosis from them.

Related reading: how to read a blood pressure reading, low blood pressure symptoms, blood pressure after eating, and low blood pressure in older adults.

Habits that may reduce episodes

Start with safe, practical steps while arranging an evaluation for recurring symptoms. Sit at the edge of the bed before rising, pause, then stand while holding a stable surface. If symptoms start, sit or lie down promptly. Move your legs or briefly tighten the calf and thigh muscles before standing; these counter-maneuvers may help some people, although they are not a substitute for evaluation. A review of diagnosis and treatment discusses individualized, primarily non-drug management and counterpressure maneuvers. Wieling et al.

Maintain your usual fluid intake, particularly during hot weather or a short-term illness, unless your clinician has limited fluids because of a heart, kidney, or other condition. Do not deliberately add large amounts of salt: this may be unsuitable, particularly when hypertension or heart failure is present. Ask your clinician what fluid and salt approach fits your health history. The AHA statement emphasizes that treating upright symptoms in someone with hypertension requires care that does not worsen pressure in other positions. AHA scientific statement

Notice patterns. If spells follow a large meal, try smaller meals and discuss the pattern; if heat or alcohol seems to precede them, avoid that trigger while you seek advice. Rising slowly, avoiding prolonged standing, and keeping walkways clear can lower the chance of a fall. Use a cane or other support if your clinician recommends it. Do not start compression garments, salt loading, or a new exercise routine for this symptom without discussing your circumstances, especially if you have heart or vascular disease.

Ask a doctor or pharmacist to review all prescription medicines, over-the-counter products, and supplements. Bring the containers or a list. They can assess whether timing or a medicine contributes and decide if any adjustment is appropriate. Never stop, skip, or change a blood pressure medicine on your own. The AHA and clinical reviews stress addressing causes and triggers first, with individualized plans because orthostatic hypotension can coexist with hypertension. AHA statement; management review.

What about supplements?

There is no established over-the-counter supplement that reliably corrects blood pressure drops on standing. Evidence-based management begins with finding the cause, reviewing medications, and considering practical measures with a clinician. Some treatment approaches can worsen high pressure while lying down, and the evidence for drug therapies is limited; supplements are not a replacement for prescribed treatment or an evaluation. Kulkarni and colleagues summarize these management challenges.

If you are comparing heart-health products, our heart and circulation supplement guide explains how we assess labels. Our scores are strict, and a product rating does not establish that a product helps this symptom. See our Cardio Shield review. Talk to your doctor before using any supplement, especially if you take medication. Results vary.

Frequently asked questions

Is it normal for blood pressure to drop when standing?

A brief adjustment can occur as the body responds to standing. Recurrent dizziness, blurred vision, weakness, or fainting should be discussed with a clinician, who can check for a sustained drop and investigate the cause. Wieling et al.

What does low blood pressure when standing up feel like?

Some people notice lightheadedness, dim vision, weakness, nausea, or near-fainting after rising. Falls or slowed thinking can also be clues, and some people have no obvious symptoms. Symptoms alone do not confirm the cause. Dani et al.

Can high blood pressure medicine cause this?

Some medicines may contribute or reveal an underlying tendency, but hypertension and orthostatic hypotension can coexist. A clinician should review the full medication list and pressure pattern. Do not stop or alter prescribed medicine yourself. AHA scientific statement

When should I call a doctor?

Seek prompt advice for repeated or worsening episodes, falls, or symptoms that interfere with daily activities. Call 911 for fainting or chest pain with low blood pressure, or for chest pain, trouble breathing, new neurological symptoms, or other emergency warning signs.

Next step: If standing symptoms keep happening, take a record of your readings and triggers to your clinician and ask about checking pressure both lying down and standing. For related basics, see normal blood pressure by age.

Results vary. Talk to your doctor before taking supplements, especially if you use medications. New or worsening symptoms deserve medical care.