Adrenaline Surges in POTS: Why Your Body Feels on Edge

Many patients describe feeling suddenly “wired,” shaky, overstimulated, or unable to calm down for no obvious reason.

Adrenaline surges in POTS are episodes of rapid heart rate, internal shaking, overstimulation, and “fight-or-flight” sensations that may occur suddenly and without warning.

Many patients describe these episodes as “adrenaline dumps.” While this is not a formal medical diagnosis, the phrase reflects periods of increased sympathetic nervous system activation.

These symptoms are commonly seen in POTS in Lyme disease, where autonomic dysfunction affects circulation and nervous system regulation.

Symptoms often occur when standing, after exertion, or at night—and may improve with rest or lying down.

For a broader overview of associated symptoms, see the Lyme Disease Symptoms Guide.

What Do Adrenaline Surges Feel Like?

Patients often describe these episodes as sudden, intense, and difficult to predict.

Common symptoms include rapid heart rate, pounding heartbeat, internal trembling, overstimulation, anxiety-like sensations without a clear emotional trigger, and difficulty falling asleep or waking with a racing heart.

Episodes may last minutes or persist for hours.

Some patients first recognize this pattern in the setting of dizziness in Lyme disease, particularly when symptoms worsen while standing.

Why Adrenaline Surges Occur in POTS

POTS is a disorder of autonomic dysfunction, where the body struggles to regulate heart rate, blood pressure, and circulation.

When standing, blood may not circulate efficiently to the brain. The body compensates by activating the body’s “fight-or-flight” response.

In some patients, this response becomes exaggerated, leading to rapid heart rate, internal shaking, overstimulation, and a persistent sense of being “on edge.”

In some cases, this pattern may reflect hyperadrenergic POTS, a subtype characterized by increased sympathetic activity.

Recent research increasingly links Lyme disease with autonomic dysfunction and POTS. Infection may affect small nerve fibers, disrupt blood flow regulation, and trigger compensatory increases in sympathetic activity.

These symptoms may overlap with patterns seen in neurologic Lyme disease, particularly when brain fog, dizziness, or sensory changes are present.

Adrenaline Surges vs Anxiety

These episodes are frequently mistaken for anxiety or panic attacks. However, several patterns may help distinguish them.

Symptoms are often triggered by standing, exertion, heat, or physiologic stress rather than emotional triggers. Episodes may occur suddenly, often alongside dizziness, palpitations, fatigue, or brain fog, and may improve when lying down.

This overlap can contribute to delayed Lyme disease diagnosis when underlying autonomic dysfunction is not recognized.

Adrenaline Surges at Night

Some patients wake suddenly with a racing heart, internal shaking, or a sense of panic.

These nighttime episodes may reflect ongoing autonomic instability and can significantly disrupt sleep quality.

Related Symptoms That Often Occur Together

Adrenaline surges rarely occur in isolation.

Patients may also experience dizziness, brain fog, fatigue, exercise intolerance, palpitations, temperature dysregulation, sensory overstimulation, and sleep disruption.

Together, these symptoms may point toward POTS and autonomic dysfunction rather than isolated anxiety or stress alone.

Frequently Asked Questions

What is an adrenaline surge in POTS?

It refers to sudden sympathetic nervous system activation causing symptoms such as rapid heart rate, shakiness, and anxiety-like sensations.

Are adrenaline surges the same as panic attacks?

Not always. In POTS, episodes are often triggered by physiologic stressors such as standing rather than emotional stress.

Can Lyme disease contribute to POTS symptoms?

Emerging research suggests Lyme disease may contribute to autonomic dysfunction and POTS patterns in some patients.

What is hyperadrenergic POTS?

Hyperadrenergic POTS is a subtype characterized by increased sympathetic nervous system activity and elevated adrenaline-related symptoms.

Clinical Takeaway

Adrenaline surges are a frequent but often misunderstood symptom pattern in POTS. The term “adrenaline dump” reflects patient experience rather than a formal diagnosis, but it corresponds clinically to increased sympathetic activation.

Recognizing adrenaline surges as part of autonomic dysfunction rather than primary anxiety may help guide more accurate diagnosis and management in patients with Lyme disease and POTS.

Related Articles

Delayed Lyme Disease Diagnosis
Post-Treatment Lyme Disease Syndrome
Panic Attack Without Anxiety in Lyme Disease
Autonomic Dysfunction in Lyme Disease

References

1. Adler BL, et al. Dysautonomia following Lyme disease. Front Neurol. 2024.

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Dr. Daniel Cameron, MD, MPH
Lyme disease clinician with over 30 years of experience and past president of ILADS.

Symptoms • Testing • Coinfections • Recovery • Pediatric • Prevention