POTS is a condition where your heart rate spikes abnormally when you move from lying or sitting to standing

Postural Orthostatic Tachycardia Syndrome (POTS) is a disorder of your autonomic nervous system—the part that controls heart rate, blood pressure, and breathing without you thinking about it. When you stand up, your body should adjust blood flow and heart rate smoothly. In POTS, that adjustment misfires: your heart rate jumps by 30 beats per minute or more within the first 10 minutes of standing, often while blood pressure stays low or drops further. The result is dizziness, lightheadedness, blurred vision, chest discomfort, or fainting.

POTS is not life-threatening, but it is disabling. Some people manage it with salt, fluids, and compression clothing. Others need medication. The key is recognizing the pattern—symptoms tied to position changes—and getting a diagnosis so you know what you are managing and what treatment options exist.

Key Takeaways

  • POTS causes your heart rate to rise sharply when you stand, often with dizziness or fainting, because your autonomic nervous system does not regulate blood flow correctly.
  • Symptoms include lightheadedness upon standing, rapid heartbeat, blurred vision, chest pain, and fatigue that worsens with heat or prolonged standing.
  • Diagnosis requires a tilt table test or 10-minute standing test performed by a cardiologist or autonomic specialist, not a standard office visit.
  • Treatment starts with non-medication approaches—increased salt and water intake, compression garments, and avoiding triggers—before moving to medications if needed.
  • Many people with POTS are initially misdiagnosed with anxiety or deconditioning because symptoms overlap and the condition is less commonly recognized.

What happens in your body when you have POTS

Your autonomic nervous system has two main branches: the sympathetic system (which speeds things up) and the parasympathetic system (which slows things down). When you stand, gravity pulls blood downward into your legs. Your sympathetic nervous system should respond by constricting blood vessels and increasing heart rate to push blood back up to your brain. In POTS, this response is either too strong, too weak, or delayed, leaving your brain temporarily short of blood.

The result is a mismatch: your heart races to compensate, but your blood pressure does not rise enough or rises too slowly. You feel dizzy, your vision blurs, your chest tightens, and you may faint. Lying down reverses the problem immediately because gravity no longer works against you. This on-off pattern—symptoms when upright, relief when horizontal—is the hallmark of POTS and distinguishes it from other conditions that cause dizziness all the time.

POTS comes in subtypes depending on what goes wrong. In hyperadrenergic POTS, your sympathetic nervous system overreacts, raising heart rate and blood pressure too much. In hypovolemic POTS, you have too little blood volume. In neuropathic POTS, the nerves that control blood vessels are damaged. A specialist can sometimes identify which type you have, though many people have mixed features.

Symptoms that point to POTS rather than other conditions

The core symptom is dizziness or lightheadedness that starts within seconds to a few minutes of standing and improves when you sit or lie down. Many people also feel their heart racing or pounding—you may notice your pulse is 100+ beats per minute while standing, even at rest. Other common symptoms include blurred or tunnel vision, chest pain or pressure, shortness of breath, tremor, sweating, and brain fog.

Fatigue is nearly universal in POTS and often worsens as the day goes on. Heat, prolonged standing, large meals, and dehydration all trigger or worsen symptoms. Some people cannot tolerate exercise, while others find that specific types of exercise (like recumbent cycling or swimming) help. Symptoms often fluctuate week to week or month to month, which can make diagnosis harder because you may feel nearly normal on the day of your appointment.

POTS is sometimes confused with anxiety, panic disorder, or deconditioning because rapid heartbeat and dizziness are shared symptoms. The difference: POTS symptoms are tied to position changes and improve immediately when you lie down, while anxiety symptoms are tied to stress and do not resolve as quickly with position change alone. If your doctor has attributed your symptoms to anxiety without testing for POTS, ask for a referral to a cardiologist or autonomic specialist.

How doctors test for POTS

Diagnosis requires an objective test, not just a description of symptoms. The gold standard is a tilt table test, performed in a cardiology or autonomic lab. You lie flat on a motorized table with heart rate and blood pressure monitors attached. The table slowly tilts you upright to a 60- to 80-degree angle for 5 to 10 minutes while the technician records your heart rate and blood pressure continuously. A diagnosis of POTS is confirmed if your heart rate increases by 30 beats per minute or more (or reaches 120 beats per minute) within the first 10 minutes of tilting, without a significant drop in blood pressure.

If a tilt table test is not available, some cardiologists use a 10-minute standing test as an alternative. You stand still while a technician measures your heart rate and blood pressure lying down, then at 1 minute and 10 minutes of standing. The same criteria apply: a 30-beat increase or a heart rate of 120+ at 10 minutes suggests POTS. This test is simpler but less controlled than a tilt table and may miss mild cases.

Before testing, your doctor may order blood work to rule out anemia, thyroid problems, or vitamin deficiencies that can cause similar symptoms. An electrocardiogram (ECG) may be done to check your heart rhythm. Some specialists also perform autonomic testing—a series of tests that measure how well your nervous system controls heart rate and blood pressure in response to breathing, temperature, and position changes.

Getting a referral and finding a specialist

Start with your primary care doctor. Describe your symptoms clearly: dizziness or lightheadedness upon standing, rapid heartbeat, and how quickly symptoms improve when you lie down. Ask for a referral to a cardiologist, preferably one with experience in autonomic disorders. If your area has an autonomic specialist or dysautonomia clinic, that is ideal, but cardiologists can diagnose and manage POTS.

Finding a specialist can be slow. Many cardiologists are unfamiliar with POTS, and some autonomic labs have long wait lists. If you are struggling to get a referral, contact the Dysautonomia International or the American Autonomic Society—both have provider directories. Some teaching hospitals and large medical centers have dedicated autonomic clinics. Telehealth appointments with autonomic specialists are increasingly available if your local options are limited.

Before your appointment, keep a symptom diary for 1 to 2 weeks: note when symptoms occur, what you were doing, how long they lasted, and what relieved them. Include your heart rate if you have a way to measure it. This record helps your doctor see the pattern and rules out other causes.

Treatment options after diagnosis

Treatment is stepped. Most people start with non-medication approaches because they work for many and have no side effects. Increase your salt intake to 9 to 12 grams per day (much higher than standard recommendations) to expand blood volume—your doctor will advise you on what is safe for your specific situation. Drink 2 to 3 liters of water daily, spread throughout the day. Avoid dehydration, which worsens symptoms dramatically.

Compression garments—waist-high compression stockings or full-body compression suits—help prevent blood from pooling in your legs when you stand. They work best when worn from the moment you wake up. Sleeping with your head elevated 30 degrees can also help. Avoid prolonged standing, hot environments, and large meals, all of which trigger symptoms.

If non-medication approaches do not control symptoms enough, medications are available. Beta-blockers slow your heart rate and are often tried first. Midodrine raises blood pressure. Fludrocortisone increases salt and water retention. Pyridostigmine improves nerve-to-muscle signaling. Your doctor will choose based on your POTS subtype and other health conditions. Finding the right medication or combination often takes trial and adjustment.

Why POTS is often missed or misdiagnosed

POTS is underdiagnosed because many doctors do not think to test for it. Symptoms overlap with anxiety, panic disorder, deconditioning, and chronic fatigue syndrome. Patients are sometimes told their symptoms are psychological or that they need to exercise more—advice that can actually worsen POTS. Some people spend years being treated for anxiety before POTS is identified.

Symptoms also fluctuate, so a patient may feel nearly normal on the day of an office visit, leading a doctor to dismiss the problem. Lying in a doctor's office does not trigger symptoms, so a standard blood pressure check will not reveal the problem. This is why the standing or tilt table test is essential—it reproduces the condition under controlled conditions.

If you have been told your symptoms are anxiety or deconditioning but they fit the POTS pattern—dizziness upon standing, rapid heartbeat, relief when lying down—ask for a referral to a cardiologist for testing. You deserve a diagnosis based on objective findings, not assumption.

Frequently Asked Questions

Can POTS go away on its own or get better over time?

POTS is chronic, meaning it does not have a cure, but symptoms can improve or worsen over months or years. Some people find their symptoms stabilize with treatment. Others experience periods of remission. Pregnancy, hormonal changes, and recovery from viral illness can all affect POTS severity. The condition itself is not progressive or life-threatening.

Is POTS the same as dysautonomia?

No. Dysautonomia is a broad category of disorders affecting the autonomic nervous system. POTS is one type of dysautonomia. Others include neurocardiogenic syncope (fainting without the heart rate spike), pure autonomic failure, and multiple system atrophy. Your doctor may use "dysautonomia" as a general term and "POTS" as the specific diagnosis.

What should I do if I faint from POTS?

Lie down immediately when you feel faint—do not wait. If you faint, stay lying down for several minutes after you regain consciousness. Tell your doctor about fainting episodes because they may recommend medication or suggest you wear a medical alert bracelet. Avoid driving if fainting is frequent or unpredictable.

Can I exercise with POTS?

Yes, but carefully. High-intensity standing exercise can worsen symptoms. Recumbent cycling, swimming, rowing, and water aerobics are often better tolerated because they do not require you to work against gravity. Start slowly and work with a physical therapist familiar with POTS. Some people find that regular exercise improves their symptoms over time.

Why do doctors sometimes miss POTS in young women?

POTS is more common in women and often appears in the teens or twenties. Doctors may attribute symptoms to anxiety, eating disorders, or deconditioning in this age group. Hormonal factors—including menstrual cycle, hormonal contraceptives, and estrogen levels—can affect POTS severity. If you are a young woman with these symptoms, be direct: ask for a standing or tilt table test rather than accepting a psychiatric diagnosis without testing.