logo

POTS vs Anxiety: How to Tell the Difference

"Your heart rate is high because you're anxious."

If you have POTS, there's a good chance you heard that sentence, possibly for years, before anyone measured your heart rate lying down and then standing up. It's the single most common wrong turn on the road to a dysautonomia diagnosis, and it happens for a reason that isn't anyone's fault: the two genuinely do share a symptom list.

Racing heart. Shortness of breath. Trembling hands. Dizziness. Nausea. Chest tightness. On paper, they look almost identical.

They are not the same thing, and the difference is more knowable than most people realise.

POTS vs anxiety how to tell the difference racing heart standing

🧠 First, the thing that has to be said out loud

Anxiety is a real condition. It is not a polite word for "imaginary", and this article is not an argument that anxiety is the lesser explanation. Plenty of people have anxiety, and they deserve treatment for it.

The problem isn't that anxiety gets diagnosed. It's that it gets diagnosed instead of looking further, and once it's in your notes, it has a way of explaining every symptom you present with afterwards.

It's also entirely possible to have both. Living with an undiagnosed, unpredictable physical condition for years is an excellent way to develop genuine anxiety. One does not rule out the other, and a POTS diagnosis doesn't invalidate an anxiety diagnosis, or the reverse.

🌿 Once it's in your notes, it explains everything after it

An anxiety label given at nineteen has a way of answering every symptom you present with for the next decade. Handing over the full range of what your body does, including the parts that have nothing to do with your heart, is what stops one word covering all of it.

⚡ Instant download · 🖨️ A4 and US Letter · Undated · No spam, ever 🌿

⚙️ The mechanism is completely different

This is the part that makes everything else make sense.

Anxiety starts with a threat, whether real, anticipated, or unidentifiable. Your brain signals danger, adrenaline follows, and your body prepares to run. The physical symptoms are downstream of the alarm.

POTS starts with gravity. When you stand, blood pools in your lower body. In most people, blood vessels constrict quickly to push it back up. In POTS, that compensation is impaired, so less blood reaches your heart, and your heart rate climbs sharply to make up the difference. The adrenaline surge is downstream of the circulation problem, not of fear.

Same hormone. Same sensations. Opposite starting point. If you want the fuller picture of what the autonomic nervous system is doing here, our plain-language guide to dysautonomia covers it properly.

🔗 Want more like this? Browse all our POTS guides →

🔍 Five questions that separate them

1. What were you doing when it started?

POTS symptoms are tied to posture. Standing up, standing still, getting out of bed, standing in a queue, a hot shower. Anxiety symptoms are tied to context, meaning a situation, a thought, a place, sometimes nothing identifiable, but rarely the specific act of becoming upright.

If your symptoms have a physical trigger you could put on a timetable, that's information.

2. Does lying down fix it?

This is the closest thing to a home test. In POTS, lying flat removes the gravitational problem, and symptoms typically ease within minutes. Improvement on returning to lying down is part of the formal criteria. Anxiety doesn't particularly care what position you're in: lying down may help you calm, but it doesn't reliably switch the physical symptoms off the way it does with orthostatic intolerance.

3. Which came first, the feeling or the body?

People with anxiety often describe dread arriving first, with the physical symptoms following. People with POTS frequently describe the opposite: the heart races, and then the alarm sets in, because a body doing something frightening is, reasonably, frightening.

That order matters, and almost nobody thinks to mention it.

4. Does it happen when you're calm?

Standing up feeling completely relaxed and still watching your heart rate climb thirty beats is not an anxiety pattern. Anxiety is bad at ambushing you in the middle of a genuinely peaceful moment with no cognitive component at all.

5. Do the classic anti-anxiety strategies work?

Breathing exercises, grounding techniques and therapy help anxiety. They can help anyone feel calmer, so a small benefit doesn't rule POTS in or out. But if you've done the work properly, for months, and standing up still does what standing up does, that's a meaningful data point rather than a personal failure.

📈 The measurement that ends the debate

Here is why this argument is more winnable than most: POTS is defined by a number.

The diagnostic criterion is a sustained heart rate increase of at least 30 beats per minute within ten minutes of standing (at least 40 bpm for those aged 12 to 19), without a sustained drop in blood pressure, alongside frequent orthostatic symptoms that improve on lying down, and with other causes excluded.

Two details from the Canadian cardiology guidance are worth knowing, because they are the ones people trip over. The increase has to be sustained, seen on at least two readings a minute apart, since a brief spike on first standing happens to plenty of people and is not POTS. And if your resting heart rate is low, under 60, the threshold is calculated from 60 rather than from your actual resting rate. Neither is something you can guess at, which is one more reason the measurement belongs in a clinic rather than in an argument.

The exclusion clause cuts both ways here: the formal criteria explicitly list primary anxiety disorders among the conditions to be considered and ruled out, alongside anaemia, thyroid problems, dehydration and others. So "could this be anxiety?" is a legitimate clinical question. It just isn't meant to be the end of the process.

Anxiety itself has no positional threshold. It cannot be measured by a heart rate monitor and a change of position.

So the conversation stops being "I don't think this is anxiety", a subjective claim a busy clinician can wave away, and becomes "here are ten mornings of lying and standing heart rates." That's not an opinion. Our guide to what to actually track with POTS covers how to record it usefully, and the diagnostic tests guide explains what a formal active stand or tilt-table test involves.

🩺 How to raise it without being written off

The framing matters more than it should. A few things that tend to land better:

  • Lead with the data, not the theory. "My heart rate goes from 72 lying to 118 standing, consistently" is harder to dismiss than "I think I have POTS."

  • Name the posture link explicitly. "It happens when I stand, and it stops when I lie down" is the sentence that most often makes a clinician look up.

  • Don't reject the anxiety question, answer it. "I've done CBT and I take it seriously. This is separate, and here's why" is far more persuasive than refusing the premise.

  • Ask for a specific thing. An active stand test is inexpensive and can often be done in the room. Asking for that is more actionable than asking to be believed.

If you've already been dismissed more than once, our guide to what to say when a doctor doesn't believe you has scripts for exactly this.

💚 The years before the diagnosis were not wasted, and they were not your fault

A great many people with POTS carry an anxiety label they were given at nineteen and never quite escaped. If that's you, the thing worth knowing is that being misread for years says nothing about you and everything about how hard this is to spot without the right test.

You were describing it accurately the whole time.

🌿 Anxiety doesn't explain the other twenty things

The heart rate is the part that gets argued about. The bladder, the temperature, the gut, the way your legs mottle when you stand: those are harder to file under one word. Tick the whole range and hand it over, and the conversation moves on from your nerves.

Free, always. Unsubscribe in one click 🌿

❓ Frequently asked questions

Can you have POTS and anxiety at the same time?

Yes, and it's common. Living with an unpredictable, undiagnosed physical condition is itself a reasonable cause of genuine anxiety. Having one diagnosis doesn't exclude the other, and both can deserve treatment in their own right.

What heart rate increase suggests POTS rather than anxiety?

The diagnostic criterion is a sustained rise of at least 30 bpm within ten minutes of standing in adults (40 bpm for ages 12 to 19), without a sustained blood pressure drop, alongside frequent orthostatic symptoms that improve on lying down and with other causes excluded. Anxiety has no equivalent positional threshold, which is precisely why the measurement is so useful.

My heart rate spikes the second I stand, then settles. Is that POTS?

Not on its own. A transient jump on first standing is common and is described in guidance as a possible sign of initial orthostatic hypotension rather than POTS. The criterion requires the increase to be sustained, confirmed on at least two readings a minute apart during the ten minutes upright. This is one of the reasons a single dramatic smartwatch reading rarely settles anything.

Why do doctors so often say it's anxiety first?

The symptom overlap is genuine, since racing heart, breathlessness, trembling and dizziness appear in both, and anxiety is far more common in the general population than POTS. The formal POTS criteria also require ruling out primary anxiety disorders, so raising it is legitimate. The problem is when the investigation stops there instead of measuring a lying-to-standing heart rate.

What if my symptoms go well beyond a racing heart?

That's worth putting in writing. Orthostatic intolerance rarely arrives on its own, and temperature regulation, digestion, bladder function, sweating and skin colour changes are all commonly reported alongside it. A single symptom is easy to attribute to anxiety; a cluster spanning several body systems is much harder to explain that way, which is why bringing the full range matters more than describing the worst one.

Can a smartwatch prove I have POTS?

No. Consumer wearables can be useful for spotting a pattern worth investigating and for showing a clinician something concrete, but they aren't diagnostic instruments and their accuracy varies. Diagnosis needs a proper clinical assessment such as an active stand or tilt-table test.

📚 Sources & further reading

The information in this article is drawn from the following sources. We encourage you to explore them.

Continue reading

⚕️ This article is general information for the chronic illness community and is not medical advice, and it cannot diagnose you. Only a qualified clinician can assess whether your symptoms are orthostatic, anxiety-related, both, or something else entirely. If anxiety is affecting your daily life, that deserves proper support in its own right.

Built with TinyPages