Dizziness when standing up is often associated with a temporary drop in blood pressure, but it can also be caused by dehydration, medications, heart conditions, or benign paroxysmal positional vertigo (BPPV). The type of dizziness and any accompanying symptoms can help distinguish between these causes.
Feeling dizzy when getting out of bed or standing up from a chair is a common experience. In most cases, the episode is brief and occurs because the body needs a moment to adjust blood pressure after a change in position.
You may feel lightheaded, notice your vision becoming dark or blurry, or experience a sensation that you are about to faint. This is more common in older adults, but it can also affect younger people, particularly after intense exercise, prolonged periods without eating, heat exposure, or dehydration.
However, not all dizziness when standing up is caused by blood pressure changes. If you feel as though the room is spinning when you get up, lie down, or turn over in bed, for example, the cause may involve the vestibular system, as in BPPV.
Paying attention to the type of sensation, how long it lasts, and which movements trigger it can help your doctor identify the underlying cause. Read on to learn more.
Why do we feel dizzy when standing up?
When you move from a lying or sitting position to standing, gravity causes some blood to temporarily pool in your legs and abdomen. This reduces the amount of blood returning to your heart and may cause a slight drop in blood pressure.
Under normal circumstances, receptors in your blood vessels detect this change. The autonomic nervous system responds by increasing your heart rate and constricting blood vessels, quickly restoring adequate blood flow to your brain.
When this response is delayed or insufficient, symptoms may occur, including:
- lightheadedness or a feeling of emptiness in the head;
- blurred or darkening vision;
- weakness;
- unsteadiness;
- temporary confusion;
- feeling as though you are about to faint;
- fainting, in more severe cases.
These symptoms usually improve when you sit or lie down again.
Are dizziness when standing up and positional vertigo the same thing?
No. This is an important distinction.
Orthostatic dizziness occurs when you move into a standing position. People often describe it as feeling faint, lightheaded, weak, or as though they might lose consciousness.
Positional vertigo, on the other hand, is triggered by changes in head position relative to gravity. People typically describe a sensation that they or their surroundings are spinning.
With BPPV, sometimes referred to as “ear crystal vertigo,” symptoms may occur when you:
- lie down;
- get out of bed;
- turn over in bed;
- look upward;
- lower your head;
- bend down to pick something up.
Episodes usually begin a few seconds after the movement and last less than a minute. Nausea and balance problems may also occur.
Therefore, getting up or lowering your head does not necessarily cause a blood pressure change. When dizziness involves a spinning sensation triggered by specific head movements, a vestibular cause should be considered.
Is frequent dizziness when standing up a sign of labyrinthitis?
Usually not. Although labyrinthitis can cause vertigo and balance problems, it is a relatively uncommon inflammatory condition affecting the inner ear that typically occurs alongside other symptoms.
In true labyrinthitis, vertigo is generally severe and persistent, often accompanied by:
- hearing loss or reduced hearing;
- tinnitus;
- a feeling of fullness or blockage in the ear;
- nausea and vomiting;
- difficulty walking.
A brief feeling of faintness that occurs only when standing up is more consistent with a circulatory problem than with labyrinthitis.
Meanwhile, brief spinning sensations triggered by turning over or getting out of bed may be related to BPPV, a much more common vestibular disorder.
What are the main causes of dizziness when standing up?
Several conditions and everyday factors can contribute to this symptom. Below are seven possible causes.
1. Standing up too quickly
An isolated episode can happen when you stand up too quickly, especially after sitting or lying down for an extended period.
As explained earlier, your circulatory system may need a few seconds to compensate for the change in position. The dizziness usually resolves on its own or when you sit down again.
However, if this happens frequently, further investigation is necessary, as it may indicate that your body’s normal blood pressure regulation is not working properly.
2. Dehydration
Not drinking enough water, excessive sweating, fever, diarrhea, and vomiting can reduce the amount of fluid circulating in your body.
With less blood returning to the heart, maintaining adequate blood pressure when standing becomes more difficult.
In addition to dizziness, you may experience:
- thirst;
- dry mouth;
- dark urine or reduced urination;
- weakness;
- headache;
- increased heart rate.
Heat can contribute to both fluid loss and blood vessel dilation, which is why episodes may be more common on hot days or after a very hot shower.
3. Medication use
Some medications can lower blood pressure or interfere with the body’s ability to respond to changes in position.
Medication classes that may contribute to dizziness include:
- antihypertensive medications;
- diuretics;
- antidepressants;
- antipsychotics;
- anti-anxiety medications and sedatives;
- medications used to treat prostate problems;
- certain medications for heart conditions.
The risk may increase after starting treatment, changing the dosage, or combining different medications.
However, you should never stop taking prescribed medication on your own. Instead, speak with your healthcare provider about reviewing your dosages, medication schedules, and possible interactions. When necessary, your doctor may recommend an alternative treatment.
4. Prolonged bed rest
Spending several days in bed can reduce cardiovascular fitness and muscle conditioning.
When you start standing and walking again, your body may have more difficulty maintaining blood pressure and delivering sufficient blood to the brain.
This is particularly relevant after hospitalization, surgery, or prolonged immobilization.
Returning to physical activity should be gradual and follow the recommendations of your healthcare team.
5. Blood loss and other causes of reduced circulating blood volume
Bleeding can reduce blood volume and cause dizziness, weakness, and a feeling of impending fainting.
Possible causes include heavy menstrual bleeding, gastrointestinal bleeding, and blood loss following surgery or injury.
Black, tarry stools, vomiting blood, marked paleness, or significant bleeding require immediate medical attention.
Anemia may also contribute to fatigue, shortness of breath during physical activity, palpitations, and dizziness, although blood tests are needed to confirm the diagnosis.
6. Heart and nervous system disorders
Some heart conditions can interfere with the body’s ability to maintain adequate blood flow when standing.
Possible causes include arrhythmias, heart valve disorders, and heart failure.
Conditions affecting the autonomic nervous system may also impair blood pressure regulation.
This can occur in people with diabetes-related autonomic neuropathy, Parkinson’s disease, and certain other neurological disorders.
These causes are less common but should be considered when episodes are persistent, lead to fainting, or occur alongside palpitations, shortness of breath, or other concerning symptoms.
7. Benign paroxysmal positional vertigo (BPPV)
BPPV does not cause low blood pressure, but it can trigger vertigo when you change position, including when getting out of bed.
In this condition, tiny calcium carbonate crystals become displaced from their usual location in the inner ear and enter one of the semicircular canals.
When you move your head, these particles stimulate the vestibular system inappropriately, creating a false sensation of rotation.
The main clue is the type of dizziness you experience.
Instead of feeling lightheaded or noticing your vision darkening, you feel as though everything around you is spinning.
BPPV is diagnosed using positional tests, while treatment involves canalith repositioning maneuvers, such as the Epley maneuver, performed by an appropriately trained healthcare professional.
What is orthostatic hypotension?
Orthostatic hypotension, also known as postural hypotension, is a significant drop in blood pressure after standing up.
It is generally defined as a decrease of at least 20 mmHg in systolic blood pressure or 10 mmHg in diastolic blood pressure within the first three minutes of standing.
However, this definition does not mean that anyone experiencing dizziness can diagnose the condition at home.
Measurement technique, time of day, medications, and other health conditions can influence the results.
Additionally, some people experience orthostatic symptoms without showing this specific blood pressure drop during a single measurement.
A proper assessment should consider blood pressure, heart rate, medical history, and the characteristics of each episode.
How do doctors investigate dizziness when standing up?
The evaluation usually begins with questions about the sensation itself, how long it lasts, and what triggers it.
It is important to tell your doctor:
- whether you experience spinning or a feeling of faintness;
- how long each episode lasts;
- whether symptoms improve when sitting or lying down;
- whether dizziness occurs only when standing or also when moving your head;
- whether you experience palpitations, shortness of breath, or chest pain;
- whether you have hearing loss, tinnitus, or nausea;
- which medications you are taking;
- whether you have recently experienced vomiting, diarrhea, bleeding, or an infection;
- whether symptoms began after surgery or prolonged bed rest.
Your blood pressure and heart rate may be measured after lying down for several minutes and then again after standing, usually at one and three minutes.
Depending on the suspected cause, your doctor may request a complete blood count, blood glucose testing, an electrocardiogram (ECG or EKG), or other investigations.
A tilt table test may be recommended in specific situations to investigate fainting episodes and abnormalities in blood pressure or heart rate regulation.
When symptoms involve spinning sensations triggered by head movements, the doctor may perform positional tests and examine your eye movements.
What should you do when you feel dizzy?
If you feel as though you are about to faint, do not try to keep walking. Sit or lie down immediately in a safe place.
If possible, lie down and elevate your legs. This may help blood return to your heart and brain, reducing the risk of losing consciousness.
Wait until your symptoms have passed before attempting to stand again.
When getting up:
- move from lying down to a sitting position;
- remain seated for a few moments;
- move your feet and ankles;
- hold on to a stable surface for support;
- stand up slowly;
- begin walking only when you feel steady.
If the environment is hot or dehydration is a possibility, drinking water may help, provided you are fully conscious and able to swallow normally.
How can you prevent dizziness when standing up?
Preventive measures depend on the underlying cause.
Some strategies that may help include:
- getting up gradually rather than rushing;
- maintaining adequate hydration;
- avoiding prolonged periods of standing or lying down;
- moving your legs and ankles before standing;
- exercising regularly, when medically appropriate;
- avoiding excessive alcohol consumption;
- being cautious in very hot environments and when taking hot showers;
- eating smaller meals if dizziness occurs after eating;
- using stable supports and adequate lighting to prevent falls;
- reviewing your medications with your doctor.
Some people with orthostatic hypotension may be advised to wear compression garments, elevate the head of their bed, or perform muscle-tensing maneuvers.
However, increasing salt intake should not be recommended to everyone.
This measure can be harmful to people with hypertension, kidney disease, or heart failure and should only be considered after medical evaluation.
You should also never stop taking blood pressure medications or diuretics without professional guidance.
When should you see a doctor?
Schedule a medical appointment if your dizziness:
- occurs repeatedly;
- is becoming more severe;
- causes falls or limits your daily activities;
- started after taking a medication;
- is accompanied by palpitations;
- occurs even when you stand up slowly;
- also happens when you turn or tilt your head;
- is accompanied by tinnitus or hearing changes.
A primary care physician or general practitioner (GP) can perform the initial evaluation.
When dizziness involves faintness, blood pressure changes, or palpitations, a cardiology assessment may be necessary.
When the main symptom is spinning vertigo triggered by head movements, an evaluation by an ENT specialist or a clinician specializing in vestibular disorders may be more appropriate.
Seek immediate medical attention if you experience:
- fainting;
- chest pain or pressure;
- shortness of breath;
- a very fast or irregular heartbeat;
- weakness or numbness on one side of the body;
- difficulty speaking;
- double vision or vision loss;
- a sudden, severe headache;
- inability to stand or walk;
- significant bleeding;
- very dark or bloody stools;
- a fall resulting in injury.
In older adults, even seemingly mild episodes deserve attention when they increase the risk of falling.
Frequently asked questions
Does dizziness when standing up always mean low blood pressure?
No. A temporary drop in blood pressure is a common cause, but dehydration, medications, heart conditions, anemia, and BPPV may also explain the symptom.
The type of dizziness you experience can help guide the investigation.
How can you tell if dizziness when standing up is caused by BPPV?
With BPPV, you typically feel as though the room is spinning.
Episodes begin after specific head movements, such as lying down, getting up, or turning over in bed, and usually last less than a minute.
Is it normal to feel dizzy when standing up quickly?
An isolated, brief episode can occur even in otherwise healthy people.
However, if the symptom happens repeatedly, causes near-fainting episodes, or occurs even when you stand up slowly, medical evaluation is recommended.
Should you check your blood pressure when you feel dizzy?
Measuring your blood pressure may provide useful information, but a single reading is not enough to establish a diagnosis.
To investigate orthostatic hypotension, blood pressure and heart rate are compared while lying down and standing, using an appropriate measurement technique.
How can you prevent dizziness when getting out of bed?
Start by sitting up, wait a few moments, move your ankles, and then stand slowly while holding on to something stable.
Adequate hydration and a medication review may also help, depending on the underlying cause.