What is the difference between vertigo and lightheadedness?

Vertigo is the sense that the room is spinning around you, usually from an inner ear problem like BPPV (benign paroxysmal positional vertigo). Lightheadedness is the sense that you are about to faint, usually from a cardiovascular or metabolic cause. We treat both, but the workup is different.

Do I need a tilt table test for POTS?

Most patients do not need a tilt table test for POTS. An at-home active stand test, where you measure heart rate and blood pressure lying and standing for 10 minutes, gives us most of the data we need without the discomfort of a full tilt study. We refer for a formal tilt table when results are ambiguous.

Can long COVID cause dizziness?

Yes, long COVID can absolutely cause dizziness and POTS-like symptoms. The virus can damage autonomic nerves, leading to dysautonomia weeks to months after the infection. The treatment framework (rest, pacing, salt, compression, gentle reconditioning) is the same as for classic POTS.

Is dizziness ever a sign of a stroke?

Yes, dizziness can be a sign of stroke when it comes with weakness, slurred speech, double vision, severe imbalance, or a sudden severe headache. These are 911 symptoms. Most everyday lightheadedness is not stroke, but the red-flag combinations need urgent evaluation.

Why does my heart race when I stand up?

Your heart races when you stand up because your autonomic nervous system tries to compensate for blood pooling in your legs. A jump of more than 30 beats per minute that lasts more than 10 minutes is the threshold for POTS. Lower blood volume, deconditioning, and post-viral injury all push the system that direction.

Can dizziness happen after meals?

Yes, dizziness after meals is common and is usually one of two things: postprandial hypotension (blood pressure drops as blood goes to the gut) or reactive hypoglycemia (blood sugar crashes 1 to 3 hours later). Smaller, protein-forward meals usually help both.

Does caffeine help or hurt dizziness?

Caffeine can help mild orthostatic symptoms in the short term by raising blood pressure. It can also worsen POTS in some patients by triggering palpitations. We test on an individual basis and rarely use more than one cup of coffee per day in dysautonomia patients.

Are compression stockings really necessary?

Compression stockings are not always necessary, but they help a lot of patients with POTS and orthostatic hypotension. The right level is 20 to 30 mmHg, knee-high or thigh-high. The best pair is the one you will actually wear, particularly on hot days or before long standing.

Can hypermobility or EDS cause POTS?

Yes, hypermobility spectrum disorders and Ehlers-Danlos Syndrome (EDS) often coexist with POTS. The connective tissue around blood vessels and the gut is more elastic, which can worsen blood pooling and slow gut motility. We screen with the Beighton score and refer to genetics when appropriate.

Is exercise safe with POTS?

Yes, exercise is safe and necessary for POTS recovery, but it must start in a recumbent position. Recumbent biking, rowing, and swimming work well at first. Standing exercise comes later as tolerance builds. Pushing too fast usually backfires.

What about ivabradine and beta blockers?

Ivabradine and beta blockers both lower heart rate, which can help POTS patients with severe palpitations. Ivabradine works specifically on the sinus node without lowering blood pressure, which makes it useful when blood pressure is already on the low side. We use them selectively, often in coordination with cardiology.

Can perimenopause worsen dizziness?

Yes, perimenopause can worsen dizziness in some patients. Estrogen helps maintain blood vessel tone, and falling estrogen can change blood pressure stability. Hormonal fluctuations also affect sleep, which affects autonomic regulation. We test full hormones and consider replacement when appropriate.

Does pregnancy affect POTS?

Pregnancy affects POTS in unpredictable ways. Blood volume rises in the second trimester, which often improves symptoms, but the postpartum drop can worsen them. We coordinate carefully with OB and adjust salt, fluids, and medications across the pregnancy.

Can mast cell activation cause dizziness?

Yes, mast cell activation syndrome (MCAS) often coexists with POTS and can cause dizziness, flushing, and gut symptoms. Mast cells release histamine and other chemicals that drop blood pressure. Treatment usually combines low-histamine eating with mast cell stabilizers like quercetin and H1/H2 blockers.

What is the role of B12 in dizziness?

Low B12 can cause neurologic symptoms including dizziness, balance problems, and brain fog. We aim for serum B12 above 500 pg/mL, with methylmalonic acid as a confirming marker. Strict vegans, people with autoimmune gastritis, and patients on metformin are at higher risk.

Are there hidden cardiac causes of dizziness?

Yes, several hidden cardiac causes deserve a workup, including atrial fibrillation, supraventricular tachycardia, valve disease, and rare conduction problems. A 24-hour or 14-day Holter monitor often catches what an in-clinic EKG misses. We coordinate with cardiology when the pattern fits.

Can anxiety treatment also help my dizziness?

Anxiety treatment can absolutely help dizziness when both are present. Mind-body work, breathwork, and selected SSRIs can stabilize autonomic tone. We pair these with the physical interventions (salt, fluids, iron, exercise) rather than choosing between them.

What is the Vanderbilt protocol for POTS?

The Vanderbilt protocol is a structured POTS rehabilitation plan that includes high salt and fluid intake, recumbent exercise, gradual upright reconditioning, and selected medications. We adapt the principles to each patients life and constraints. Vanderbilt is one of the leading academic centers for POTS research.

Does ivabradine cause issues with pregnancy?

Yes, ivabradine is not recommended during pregnancy because of limited safety data and animal studies. We plan medication transitions before conception in patients with POTS who hope to become pregnant. Sodium, fluids, and compression remain safe across pregnancy.

Can mold exposure cause dizziness?

Yes, mold exposure in damp Philly rowhomes can contribute to dizziness, brain fog, and fatigue through inflammation and histamine release. If your basement is musty or you feel worse at home than away, a professional inspection is reasonable. We address indoor air alongside the autonomic workup.

What about ketogenic or low-carb diets for POTS?

Ketogenic and low-carb diets can either help or worsen POTS. Some patients feel steadier without glucose swings. Others lose too much sodium and water on keto and feel worse. We trial diet changes carefully and watch electrolytes closely.

How does sleep affect dizziness?

Poor sleep worsens dizziness through several pathways. It raises sympathetic tone (the gas pedal), lowers heart rate variability, and reduces blood volume restoration overnight. We treat sleep as a primary intervention, not an afterthought.

Can Wegovy or Ozempic worsen POTS?

Yes, GLP-1 medications like Wegovy and Ozempic can worsen POTS in some patients through dehydration, lower blood pressure, and slower gastric emptying. We start at low doses, monitor symptoms, and emphasize fluids and electrolytes. We sometimes pause or switch the medication.

What is the difference between vertigo and lightheadedness?

Vertigo is the sense that the room is spinning around you, usually from an inner ear problem like BPPV (benign paroxysmal positional vertigo). Lightheadedness is the sense that you are about to faint, usually from a cardiovascular or metabolic cause. We treat both, but the workup is different.

Do I need a tilt table test for POTS?

Most patients do not need a tilt table test for POTS. An at-home active stand test, where you measure heart rate and blood pressure lying and standing for 10 minutes, gives us most of the data we need without the discomfort of a full tilt study. We refer for a formal tilt table when results are ambiguous.

Can long COVID cause dizziness?

Yes, long COVID can absolutely cause dizziness and POTS-like symptoms. The virus can damage autonomic nerves, leading to dysautonomia weeks to months after the infection. The treatment framework (rest, pacing, salt, compression, gentle reconditioning) is the same as for classic POTS.

Is dizziness ever a sign of a stroke?

Yes, dizziness can be a sign of stroke when it comes with weakness, slurred speech, double vision, severe imbalance, or a sudden severe headache. These are 911 symptoms. Most everyday lightheadedness is not stroke, but the red-flag combinations need urgent evaluation.

Why does my heart race when I stand up?

Your heart races when you stand up because your autonomic nervous system tries to compensate for blood pooling in your legs. A jump of more than 30 beats per minute that lasts more than 10 minutes is the threshold for POTS. Lower blood volume, deconditioning, and post-viral injury all push the system that direction.

Can dizziness happen after meals?

Yes, dizziness after meals is common and is usually one of two things: postprandial hypotension (blood pressure drops as blood goes to the gut) or reactive hypoglycemia (blood sugar crashes 1 to 3 hours later). Smaller, protein-forward meals usually help both.

Does caffeine help or hurt dizziness?

Caffeine can help mild orthostatic symptoms in the short term by raising blood pressure. It can also worsen POTS in some patients by triggering palpitations. We test on an individual basis and rarely use more than one cup of coffee per day in dysautonomia patients.

Are compression stockings really necessary?

Compression stockings are not always necessary, but they help a lot of patients with POTS and orthostatic hypotension. The right level is 20 to 30 mmHg, knee-high or thigh-high. The best pair is the one you will actually wear, particularly on hot days or before long standing.

Can hypermobility or EDS cause POTS?

Yes, hypermobility spectrum disorders and Ehlers-Danlos Syndrome (EDS) often coexist with POTS. The connective tissue around blood vessels and the gut is more elastic, which can worsen blood pooling and slow gut motility. We screen with the Beighton score and refer to genetics when appropriate.

Is exercise safe with POTS?

Yes, exercise is safe and necessary for POTS recovery, but it must start in a recumbent position. Recumbent biking, rowing, and swimming work well at first. Standing exercise comes later as tolerance builds. Pushing too fast usually backfires.

What about ivabradine and beta blockers?

Ivabradine and beta blockers both lower heart rate, which can help POTS patients with severe palpitations. Ivabradine works specifically on the sinus node without lowering blood pressure, which makes it useful when blood pressure is already on the low side. We use them selectively, often in coordination with cardiology.

Can perimenopause worsen dizziness?

Yes, perimenopause can worsen dizziness in some patients. Estrogen helps maintain blood vessel tone, and falling estrogen can change blood pressure stability. Hormonal fluctuations also affect sleep, which affects autonomic regulation. We test full hormones and consider replacement when appropriate.

Does pregnancy affect POTS?

Pregnancy affects POTS in unpredictable ways. Blood volume rises in the second trimester, which often improves symptoms, but the postpartum drop can worsen them. We coordinate carefully with OB and adjust salt, fluids, and medications across the pregnancy.

Can mast cell activation cause dizziness?

Yes, mast cell activation syndrome (MCAS) often coexists with POTS and can cause dizziness, flushing, and gut symptoms. Mast cells release histamine and other chemicals that drop blood pressure. Treatment usually combines low-histamine eating with mast cell stabilizers like quercetin and H1/H2 blockers.

What is the role of B12 in dizziness?

Low B12 can cause neurologic symptoms including dizziness, balance problems, and brain fog. We aim for serum B12 above 500 pg/mL, with methylmalonic acid as a confirming marker. Strict vegans, people with autoimmune gastritis, and patients on metformin are at higher risk.

Are there hidden cardiac causes of dizziness?

Yes, several hidden cardiac causes deserve a workup, including atrial fibrillation, supraventricular tachycardia, valve disease, and rare conduction problems. A 24-hour or 14-day Holter monitor often catches what an in-clinic EKG misses. We coordinate with cardiology when the pattern fits.

Can anxiety treatment also help my dizziness?

Anxiety treatment can absolutely help dizziness when both are present. Mind-body work, breathwork, and selected SSRIs can stabilize autonomic tone. We pair these with the physical interventions (salt, fluids, iron, exercise) rather than choosing between them.

What is the Vanderbilt protocol for POTS?

The Vanderbilt protocol is a structured POTS rehabilitation plan that includes high salt and fluid intake, recumbent exercise, gradual upright reconditioning, and selected medications. We adapt the principles to each patients life and constraints. Vanderbilt is one of the leading academic centers for POTS research.

Does ivabradine cause issues with pregnancy?

Yes, ivabradine is not recommended during pregnancy because of limited safety data and animal studies. We plan medication transitions before conception in patients with POTS who hope to become pregnant. Sodium, fluids, and compression remain safe across pregnancy.

Can mold exposure cause dizziness?

Yes, mold exposure in damp Philly rowhomes can contribute to dizziness, brain fog, and fatigue through inflammation and histamine release. If your basement is musty or you feel worse at home than away, a professional inspection is reasonable. We address indoor air alongside the autonomic workup.

What about ketogenic or low-carb diets for POTS?

Ketogenic and low-carb diets can either help or worsen POTS. Some patients feel steadier without glucose swings. Others lose too much sodium and water on keto and feel worse. We trial diet changes carefully and watch electrolytes closely.

How does sleep affect dizziness?

Poor sleep worsens dizziness through several pathways. It raises sympathetic tone (the gas pedal), lowers heart rate variability, and reduces blood volume restoration overnight. We treat sleep as a primary intervention, not an afterthought.

Can Wegovy or Ozempic worsen POTS?

Yes, GLP-1 medications like Wegovy and Ozempic can worsen POTS in some patients through dehydration, lower blood pressure, and slower gastric emptying. We start at low doses, monitor symptoms, and emphasize fluids and electrolytes. We sometimes pause or switch the medication.

POTS, Dysautonomia & Dizziness in Philadelphia

TL;DR30-second take

Lightheadedness is rarely just anxiety. It is usually a problem with how blood, salt, sugar, and signals move when you stand up. We measure orthostatic vitals at home, check ferritin and fasting insulin, and screen for POTS and dysautonomia. Salt, fluids, and targeted nutrition often ease symptoms within weeks.

You stand up from your desk at the Navy Yard and your vision tunnels. You walk down Frankford Avenue in July and have to lean against a wall because the ground feels like a ship deck.

You go to the ER and they check your heart. Normal. You see an ENT and they check your inner ear. Normal. So you hear it must be stress.

That is not a misdiagnosis. It is the result of a system designed to rule out emergencies, not solve complex physiology puzzles.

"Gravity is a constant challenge for your circulatory system. When you stand up, your body has milliseconds to push blood up against gravity. If that reflex is slow, your brain dims the lights."

Why Do I Feel Dizzy When I Stand Up?

You feel dizzy when you stand up because blood briefly pools in your legs and pelvis, which drops the pressure your brain needs. A healthy autonomic nervous system squeezes blood vessels and speeds up the heart within seconds. When that reflex is slow or out of tune, you feel lightheaded for a few seconds to a few minutes.

The most common reasons we see at Fishtown Medicine include:

Low blood volume. Not enough salt and water inside your blood vessels.
POTS (Postural Orthostatic Tachycardia Syndrome), where the heart rate jumps more than 30 beats per minute on standing.
Orthostatic hypotension, where blood pressure drops more than 20 mmHg on standing.
Iron deficiency with low ferritin starving the brain of oxygen.
Reactive hypoglycemia, a blood sugar crash 1 to 3 hours after eating.

Is My Dizziness "Just Anxiety"?

Your dizziness is probably not "just anxiety," even though anxiety and dysautonomia share many symptoms. The autonomic nervous system runs both the fight-or-flight response (which feels like anxiety) and your blood pressure (which causes dizziness). The two often coexist, but one is usually driving the other.

I differentiate the two with measurements rather than assumptions. If your heart rate jumps 40 beats per minute the moment you stand, that is a physical signal, not a mental one.

Is It POTS, Orthostatic Intolerance, or a Metabolic Problem?

POTS, orthostatic intolerance, and metabolic dizziness all look similar from the outside. The right test sorts them out.

POTS. Common in young adults in their 20s and 30s. Heart rate rises more than 30 beats per minute within 10 minutes of standing. Often runs in families.
Orthostatic hypotension. Blood pressure drops more than 20 mmHg systolic on standing. More common after age 50 or with certain medications.
Reactive hypoglycemia. Blood sugar crashes 1 to 3 hours after a meal. Symptoms cluster around food, not posture.
Iron deficiency. You can have ferritin under 30 ng/mL with normal hemoglobin and still have brain symptoms. We aim for ferritin above 75 ng/mL in symptomatic patients.
Hypovolemia. Low total blood volume from low salt intake or heavy sweating. The fix is fluids and sodium, not more water alone.

What Is the Fishtown Framework for Dizziness?

The Fishtown framework for dizziness measures, then nourishes, then restores. We do not just prescribe a beta-blocker and send you home.

1. Measure (The Autonomic Audit)

The active stand test. Take blood pressure and heart rate lying, sitting, and standing at 1, 3, 5, and 10 minutes. We can teach you to do this at home.
Iron panel. Ferritin, iron saturation, and total iron-binding capacity. We aim for ferritin above 75 ng/mL.
Continuous glucose monitor (CGM). A 2-week trial catches reactive hypoglycemia that fasting labs miss.
Echocardiogram and EKG when indicated. To rule out structural or electrical heart issues.

2. Nourish (Salt is Medicine)

For many dysautonomia patients, the standard low-salt advice backfires.

Sodium loading. 6 to 10 grams of sodium per day for selected POTS patients, using LMNT, LiquidIV, or salt tablets.
Hydration target. 2 to 3 liters of fluid daily, paired with the sodium.
Protein anchoring. 30 grams of protein at breakfast to flatten blood sugar swings.

3. Restore (Tone the Vagus Nerve)

If your nervous system is stuck in fight or flight, you cannot regulate blood flow well. We focus on vagal tone (the activity of the vagus nerve, which calms the body).

Breathwork. 4-7-8 breathing or box breathing twice daily.
Cold exposure. Brief cool showers in the right candidates.
Sleep architecture work to restore baseline autonomic balance.

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How Should I Handle Philadelphia Summers with POTS?

Philadelphia summers are tough on POTS and dysautonomia patients because the heat causes vasodilation (your blood vessels widen), which drops blood pressure further. We build a summer survival plan with each patient.

Pre-load electrolytes 30 minutes before commuting on SEPTA or walking outdoors.
Compression stockings rated 20 to 30 mmHg, knee-high or thigh-high, that you will actually wear.
Cooling tools. Cooling neck wraps, ice water bottles, and shaded routes through the city.
Know your safe zones. Air-conditioned shops, libraries, and SEPTA stations along your daily route.

When Should I See a Specialist?

You should see a specialist when symptoms are severe, when standard treatment is not working, or when red flags appear. We refer to cardiology and neurology partners when we suspect any of the following.

Structural heart issues. Valve problems or arrhythmias.
Severe debilitating POTS. Cases needing IV fluids or layered medications.
Central vertigo. Signs of stroke or a brainstem lesion (severe imbalance, double vision, slurred speech, weakness).
Sudden onset symptoms in an older adult.

Actionable Steps in Philly

A practical plan for lightheadedness.

Run an active stand test. Take blood pressure and heart rate lying, sitting, and standing at 1, 3, 5, and 10 minutes. Bring the data to your visit.
Salt up. Add 1 to 2 grams of sodium to your morning routine via LMNT or salt water. Sip water all day rather than chugging.
Front-load protein. 30 grams of protein at breakfast. Avoid pure carbohydrate snacks alone.
Get the right labs. Ask for ferritin, iron saturation, fasting insulin, and a hemoglobin A1c. If you are over 35, add a thyroid panel.
Try compression. Knee-high 20 to 30 mmHg compression stockings on hot days or long standing days.

Key Takeaways

Test, do not guess. Dizziness needs data: orthostatic vitals, iron, glucose.
Salt is often the medicine. For dysautonomia, low-salt advice can backfire.
Ferritin matters. Low iron storage is the most missed cause of dizziness in young women.
Advocate for your reality. It is not just anxiety. It is physiology.

Scientific References

Sheldon RS, et al. "2015 heart rhythm society expert consensus statement on the diagnosis and treatment of POTS." Heart Rhythm. 2015.
Raj SR. "Postural Tachycardia Syndrome (POTS)." Circulation. 2013.
Larsen NW, et al. "Long COVID and dysautonomia." Nature Reviews Cardiology. 2022.
Camaschella C. "Iron deficiency." Blood. 2019.
Fu Q, Levine BD. "Exercise in the postural orthostatic tachycardia syndrome." Autonomic Neuroscience. 2015.

Dizziness and a Racing Heart When You Stand - a patient case on catching POTS with a 10-minute stand test
Respiratory Congestion - the same-day workup for sinus and respiratory symptoms
Cold Sores - HSV outbreaks, triggers, and suppressive options
Sick After Flu Shot - what's expected versus what's not, after vaccination
Swollen Lymph Nodes - when to watch and when to work it up
Tattoo & Piercing Infection - the same-day care path for skin infections
Cuts at Home - when to suture, when to glue, when to come in
High Blood Pressure at Home - the at-home BP workup that tells us more than office readings
Nausea - the clinical workup for persistent or unexplained nausea
Bloating & Digestive Discomfort - the structured GI workup for bloating that won't quit

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Ashvin Vijayakumar MD (Dr. Ash) is a board-certified internal medicine physician at Fishtown Medicine in Philadelphia. He acts as a detective for patients with mystery symptoms like dizziness, fatigue, and brain fog.

Fishtown Medicine | Symptoms

2418 E York St, Philadelphia, PA 19125(267) 360-7927 hello@fishtownmedicine.comHSA/FSA Eligible

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