Long COVID and POTS: When Your Heart Rate Won't Settle Down

If you've noticed your heart racing every time you stand up, alongside dizziness, fatigue or brain fog that seems to worsen when you're upright, you may be dealing with more than ordinary post-viral tiredness. For some people recovering from COVID-19, this pattern points towards a specific condition called POTS.

What is POTS?

POTS stands for postural orthostatic tachycardia syndrome, a form of dysautonomia, meaning a dysfunction of the autonomic nervous system, the part of your body that automatically regulates things like heart rate and blood pressure without you having to think about it. It's defined by a persistent increase in heart rate of at least 30 beats per minute within about ten minutes of standing up from lying or sitting, typically without a significant drop in blood pressure.

Why standing up triggers symptoms

In people with POTS, an insufficient volume of blood returns to the heart when they stand, which the body tries to compensate for by speeding up the heart rate. This compensation often isn't quite enough, leading to lightheadedness, sometimes fainting and a cluster of other symptoms that can feel deeply disorienting if you don't know what's causing them. Lying back down typically brings some relief, which is itself a useful clue that orthostatic intolerance, meaning intolerance to being upright, is involved.

How common is POTS after COVID-19?

Research suggests dysautonomia affects a substantial proportion of people with long COVID, with one study using a validated symptom questionnaire finding moderate to severe autonomic symptom scores in a majority of long COVID patients assessed. Not everyone with these symptoms meets the strict clinical definition of POTS specifically, but orthostatic intolerance more broadly appears to be a genuinely common feature of the long COVID experience for a meaningful share of people.

What symptoms typically go alongside a racing heart

POTS rarely shows up as an isolated racing heart. Many people also experience palpitations, dizziness, fatigue, brain fog, breathlessness and, in some cases, actual fainting episodes, particularly when standing for extended periods or in warm environments. According to the CDC's clinical symptom guidance for long COVID, lightheadedness and a fast heart rate are recognised among the documented symptoms clinicians should be aware of when assessing long COVID patients.

How is POTS actually diagnosed?

Diagnosis typically involves measuring your heart rate and blood pressure both lying down and after standing, sometimes using a formal tilt-table test in a clinical setting, which allows a doctor to observe how your heart rate responds to a controlled change in position over a longer period than a quick office check would capture. Because the diagnostic threshold is specific, meaning a defined heart rate increase without a significant blood pressure drop, self-diagnosing from symptoms alone isn't reliable and a proper clinical assessment is the only way to confirm it.

Is long COVID definitely the cause?

This remains an area of active research and the honest answer is that the relationship isn't yet fully settled. Whether long COVID directly causes autonomic dysfunction, triggers POTS symptoms through a previously identified mechanism, or unmasks a predisposition that was already present, is still being worked out by researchers. What's clearer is the correlation itself: a meaningful number of people who didn't have these symptoms before COVID-19 have developed them afterwards, which is enough to warrant taking the connection seriously in clinical practice even while the underlying mechanism remains under study.

What treatment options exist

Management of long COVID-related POTS tends to draw on approaches already established for POTS from other causes, since it's the same underlying dysfunction regardless of what triggered it. This can include conservative measures like increasing fluid and salt intake to help maintain blood volume, wearing compression stockings to reduce blood pooling in the legs and a carefully graded exercise programme, since exercise intolerance is itself often part of the condition and needs a cautious, structured approach rather than pushing through as you might with ordinary deconditioning. Some people also benefit from psychological support or cognitive behavioural approaches, not because the condition is "in their head," but because living with an unpredictable, disruptive condition carries a genuine psychological toll worth addressing directly.

Practical daily adjustments that can help

Beyond formal treatment, small daily adjustments can meaningfully reduce how often symptoms flare. Standing up slowly rather than suddenly, avoiding prolonged standing without moving, staying well hydrated throughout the day rather than in large infrequent amounts and avoiding overheating, which tends to worsen symptoms for many people with POTS, are all commonly recommended, low-cost strategies worth building into your routine while you're managing this condition.

When to seek a specialist assessment

If a racing heart, dizziness or fainting on standing is a regular pattern for you, particularly since a COVID-19 infection, raising this specifically with your doctor and asking about POTS or dysautonomia by name is worth doing directly, rather than only describing general fatigue or brain fog. Because POTS isn't always the first thing considered when someone reports post-viral tiredness, being specific about the standing-related pattern helps guide your doctor towards the right diagnostic tests more quickly.

How POTS affects daily life beyond the physical symptoms

Living with POTS often means recalibrating how you approach ordinary tasks that most people never think twice about, from standing in a queue to taking a hot shower, both of which can trigger symptoms for some people with the condition. This can be genuinely disorientating, particularly for people who were previously active and healthy before developing symptoms and adjusting to a body that now responds unpredictably to simple positional changes takes real time and patience. Employers, family members and friends who aren't familiar with POTS sometimes struggle to understand why someone who "looks fine" sitting down might need to avoid standing for long periods, which is part of why clear communication about the condition, backed by a proper diagnosis, can make a genuine practical difference.

A quick recap

POTS, a form of dysautonomia involving a rapid heart rate increase on standing, appears to affect a meaningful share of people with long COVID, alongside related symptoms like dizziness, fatigue and brain fog. Diagnosis requires proper clinical assessment rather than self-diagnosis and management typically combines conservative measures like hydration and compression garments with a carefully graded approach to activity.

Frequently asked questions

Does POTS from long COVID ever fully resolve?

Some people see significant improvement over time, particularly with appropriate management, though the overall long-term trajectory varies considerably between individuals and continues to be studied.

Is POTS the same thing as general long COVID fatigue?

No, POTS is a specific, diagnosable condition involving a defined heart rate response to standing, distinct from general fatigue, though the two can certainly occur together in the same person.

Can exercise make POTS symptoms worse?

Standard exercise can worsen symptoms if it's not appropriately adapted, which is why a carefully graded, specialist-guided exercise programme is generally recommended over resuming your previous routine at full intensity.

Should I be tested for POTS if I only have brain fog after COVID-19?

If brain fog is your only symptom without any pattern related to standing or position, POTS may be less likely, though mentioning all your symptoms to a doctor helps them consider the full picture rather than ruling anything out prematurely.

Does POTS after COVID-19 need lifelong treatment?

Not necessarily; some people find their symptoms improve enough over time to need less ongoing management, while others require longer-term strategies and this varies enough between individuals that it's best discussed with your own treating clinician.