Postural orthostatic tachycardia syndrome (POTS) is a syndrome where your heart rate rises abnormally fast when you sit or stand up, causing symptoms like dizziness, rapid heartbeat, and sometimes fainting, because the autonomic nervous system is not regulating blood flow properly. Although people often call it “POTS disease,” medically it’s considered a cluster of symptoms (a syndrome), not a single disease with one cause.

What is POTS disease?

POTS (Postural Orthostatic Tachycardia Syndrome) is a disorder of the autonomic nervous system, the system that controls automatic body functions such as heart rate, blood pressure, and digestion. When someone with POTS moves from lying or sitting to standing, their heart rate jumps much more than it should, without a big drop in blood pressure.

Typical diagnostic criteria include:

  • Heart rate increase of at least 30 beats per minute (bpm) within 10 minutes of standing (40 bpm in teens)
  • Or a heart rate above 120 bpm on standing
  • No significant fall in blood pressure (no orthostatic hypotension)
  • Symptoms of “orthostatic intolerance” (feeling unwell upright, better lying down) for at least several months

Doctors often diagnose it with a tilt‑table test or repeated lying/standing measurements of heart rate and blood pressure.

Common symptoms people notice

Many people first describe POTS as “I stand up and feel like I’m going to pass out.” Symptoms usually improve when lying down.

Frequent symptoms include:

  • Fast heartbeat or palpitations on standing
  • Lightheadedness, dizziness, or near‑fainting, sometimes full fainting
  • Severe fatigue and exercise intolerance
  • “Brain fog” (trouble concentrating, slowed thinking)
  • Headaches, blurred vision
  • Nausea, bloating, sometimes stomach discomfort
  • Shortness of breath, chest discomfort
  • Cold, painful, or discolored (purplish) hands and feet due to blood pooling in the legs

Symptoms can range from mild (still able to work/study) to very disabling, affecting basic daily tasks.

Is POTS serious or dangerous?

POTS is usually not life‑threatening in the sense of directly stopping the heart, but it can be seriously disabling and life‑changing. Studies show some patients have quality‑of‑life impairments similar to those with heart failure or patients on dialysis.

Important points:

  • It can cause injury risk due to fainting or near‑fainting.
  • It often co‑exists with other conditions like Ehlers‑Danlos syndrome, autoimmune diseases, chronic fatigue–like illnesses, or occurs after infections (including COVID‑19), surgery, or trauma.
  • Anxiety is often mistaken as the cause, but research shows POTS is not simply anxiety; it is a physical dysautonomia.

If someone has chest pain, severe shortness of breath, or frequent fainting, urgent medical evaluation is important, because those symptoms can overlap with other dangerous problems.

What causes POTS?

POTS is “heterogeneous,” meaning different people have it for different underlying reasons. It is more common in females between about 15 and 50, but anyone can be affected.

Known or suspected contributors and triggers include:

  • Autonomic nervous system malfunction (dysautonomia)
  • Low blood volume (hypovolemia)
  • Excess “fight or flight” signaling (high norepinephrine, sympathetic overactivation)
  • Small‑fiber neuropathy (damage to small autonomic nerves)
  • Autoimmune diseases (e.g., SjĂśgren’s, lupus) or autoimmune‑like mechanisms
  • Connective‑tissue disorders such as Ehlers‑Danlos syndrome
  • Viral infections (mono, EBV, COVID‑19), other infections, or post‑COVID/Long COVID
  • Trauma, surgery, pregnancy, or prolonged bed rest/deconditioning
  • Some cases have no clear cause (idiopathic POTS)

Because it’s a syndrome, clinicians often look for both POTS and any underlying condition that might be driving it.

How is POTS treated?

There is currently no single cure, but many people improve with a combination of lifestyle changes and medications tailored to their pattern of symptoms.

Common non‑drug strategies include:

  • Increasing fluids to about 2–3 liters per day (if your doctor agrees)
  • Increasing salt intake (often 8–10 grams per day) under medical supervision
  • Wearing compression stockings or abdominal binders to reduce blood pooling
  • Raising the head of the bed slightly at night
  • Doing recumbent or semi‑recumbent exercise (rowing, recumbent bike, swimming) and slowly building up fitness
  • Avoiding triggers like very hot environments, long standing, heavy meals, alcohol, or sudden position changes

Medications used (depending on the person) can include:

  • Volume‑expanding drugs like fludrocortisone
  • Medications that constrict blood vessels (e.g., midodrine)
  • Heart‑rate controlling drugs (various beta‑blockers, sometimes ivabradine in some regions)
  • Drugs that modulate the autonomic nervous system (clonidine, pyridostigmine, certain antidepressants)

If an underlying cause is identified (such as an autoimmune disease or iron deficiency), treating that can significantly help the POTS symptoms.

Outlook and “latest” context

Long‑term follow‑up suggests that many people, especially younger patients, improve over time, with some becoming nearly or completely symptom‑free, though others remain chronically affected. Since the COVID‑19 pandemic, clinicians and researchers have reported a rise in POTS and POTS‑like syndromes in people after COVID or as part of Long COVID, and active research is ongoing into causes and treatments.

Simple HTML table overview

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<table>
  <thead>
    <tr>
      <th>Aspect</th>
      <th>Key points about POTS</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>What it is</td>
      <td>Autonomic nervous system syndrome causing excessive heart rate increase when standing, with orthostatic intolerance symptoms.[web:1][web:2][web:7][web:9]</td>
    </tr>
    <tr>
      <td>Main symptoms</td>
      <td>Rapid heartbeat, dizziness, fainting, fatigue, brain fog, headaches, nausea, shortness of breath, blood pooling in legs.[web:1][web:2][web:5][web:7][web:9]</td>
    </tr>
    <tr>
      <td>Who it affects</td>
      <td>Any age, but especially women 15–50; often previously healthy young people.[web:1][web:2][web:5][web:7][web:9]</td>
    </tr>
    <tr>
      <td>Causes/triggers</td>
      <td>Dysautonomia, low blood volume, autoimmune issues, infections (incl. COVID‑19), connective‑tissue disorders, trauma, surgery, pregnancy, or unknown causes.[web:1][web:2][web:5][web:8][web:9]</td>
    </tr>
    <tr>
      <td>Treatment</td>
      <td>Hydration, high salt (if safe), compression, graded exercise, lifestyle changes, and tailored medications; treat any underlying disease.[web:1][web:2][web:5][web:7][web:8][web:10]</td>
    </tr>
    <tr>
      <td>Prognosis</td>
      <td>Often chronic but many improve; impact can be severe, but symptoms can be managed and sometimes significantly reduced over time.[web:1][web:2][web:7][web:10]</td>
    </tr>
  </tbody>
</table>

If you (or someone you know) has symptoms like fast heart rate, dizziness, or fainting on standing, it’s important to see a doctor—ideally one familiar with autonomic disorders—for proper testing and a personalized treatment plan.

Information gathered from public forums or data available on the internet and portrayed here.