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When COVID Leaves Behind Tremors: A Growing Clinical Challenge
Among the many persistent symptoms reported by long COVID patients, neurological manifestations have proven particularly distressing and difficult to treat. Tremors — involuntary, rhythmic shaking movements — are increasingly recognized as a significant post-COVID symptom, affecting patients who had no prior history of movement disorders.
At St. George Hospital, Dr. Julian Douwes and our medical team have treated hundreds of post-COVID patients from around the world. We have observed that post-COVID tremors, while alarming, are treatable when approached with an understanding of the underlying mechanisms driving them.
Why Tremors Develop After COVID-19
The development of new-onset tremors following SARS-CoV-2 infection involves several interrelated pathological mechanisms. Understanding these mechanisms is essential for developing effective treatment strategies.
Neuroinflammation
SARS-CoV-2 triggers a profound inflammatory response that can affect the central nervous system. The virus can activate microglia — the brain’s resident immune cells — leading to sustained neuroinflammation even after the acute infection has resolved. This chronic neuroinflammatory state can disrupt the basal ganglia and cerebellar circuits that control smooth, coordinated movement.
Neuroimaging studies have revealed increased inflammatory markers in the brains of long COVID patients, particularly in regions associated with motor control. A 2022 study in Nature Medicine documented persistent brain inflammation and microstructural changes in COVID-19 survivors months after infection (Douaud et al., 2022).
Autoimmune Mechanisms
COVID-19 can trigger autoimmune responses through molecular mimicry — where the immune system, after fighting the virus, begins attacking the body’s own neural tissues because certain viral proteins resemble host proteins. This autoimmune neurological attack can manifest as:
- Action tremors (occurring during voluntary movement)
- Postural tremors (occurring while maintaining a position against gravity)
- Intention tremors (worsening as the hand approaches a target)
- Internal tremors (a sensation of vibrating or shaking felt internally but not always visible)
Research by Dr. Beate Jaeger and others has identified autoantibodies targeting neural tissue in post-COVID patients, suggesting that autoimmune mechanisms play a significant role in neurological long COVID symptoms. This understanding represents an important research direction, though the precise autoimmune pathways are still being characterized.
Endothelial Dysfunction and Microcirculation Impairment
COVID-19 damages the endothelium — the inner lining of blood vessels — throughout the body, including the microvasculature of the brain. This endothelial dysfunction leads to impaired microcirculation, reducing oxygen and nutrient delivery to neural tissue. Microclots — small fibrin clots that resist normal dissolution — can further obstruct capillary blood flow in the brain.
Dr. Beate Jaeger’s research on microclots and microcirculation impairment in post-COVID patients has been influential in understanding why neurological symptoms persist. When brain regions responsible for motor control receive inadequate blood flow, tremors and other movement abnormalities can result.
Autonomic Nervous System Dysfunction
Post-COVID autonomic dysfunction (dysautonomia) affects the balance between the sympathetic and parasympathetic nervous systems. This dysregulation can contribute to tremor through increased sympathetic tone, altered neurotransmitter balance, and impaired neural signaling. Many patients with post-COVID tremors also experience other autonomic symptoms including heart rate variability, blood pressure instability, and temperature dysregulation.
Diagnostic Evaluation
At St. George Hospital, our evaluation of post-COVID tremor patients includes:
Neurological Assessment
- Detailed neurological examination characterizing tremor type, frequency, and distribution
- Assessment of other neurological signs (neuropathy, cognitive impairment, gait disturbance)
- Standardized tremor rating scales
Laboratory Workup
- Inflammatory markers (CRP, IL-6, TNF-alpha, neopterin)
- Autoantibody panels (anti-neuronal antibodies, GPCR autoantibodies)
- Microcirculation assessment
- Comprehensive metabolic and nutritional panel
- Thyroid function (thyroid dysfunction is a common treatable cause of tremor that must be ruled out)
Functional Diagnostics
- Quantitative EEG (qEEG) to assess brain electrical activity patterns
- Heart rate variability (HRV) testing for autonomic function
- Capillaroscopy or other microcirculation assessment when available
Treatment Options for Post-COVID Tremor
Neurofeedback Therapy
Neurofeedback is one of our primary treatment modalities for post-COVID neurological symptoms, including tremors. By providing real-time feedback on brain electrical activity, neurofeedback trains the brain to shift away from dysfunctional patterns associated with neuroinflammation and autonomic dysregulation.
For post-COVID tremor patients, neurofeedback protocols typically target:
- Sensorimotor rhythm (SMR) training to stabilize motor cortex activity
- Alpha-theta training for autonomic nervous system rebalancing
- Beta training for cognitive clarity and reduced brain fog
Sessions are conducted daily during the inpatient stay, with a typical course of 10 to 15 sessions over two weeks.
Therapeutic Apheresis
For patients with documented autoantibodies or evidence of microclot pathology, therapeutic apheresis can remove pathological factors from the blood. This may include:
- Immunoadsorption: Selective removal of autoantibodies
- H.E.L.P. apheresis: Removal of fibrinogen, inflammatory lipoproteins, and microclots
- Plasmapheresis: Exchange of plasma to reduce inflammatory mediators
Ozone Therapy
Medical ozone therapy (major autohemotherapy) improves oxygen delivery to tissues, modulates immune function, and reduces oxidative stress. For post-COVID tremor patients, ozone therapy supports improved microcirculation in the brain and helps resolve the chronic inflammatory state driving neurological symptoms.
NAD+ and Nutrient Infusions
Intravenous NAD+ supports neuronal energy metabolism and DNA repair — both critical for recovering neural function after inflammatory damage. Additional targeted infusions may include high-dose B vitamins, magnesium, alpha-lipoic acid, and glutathione to support neurological repair and reduce oxidative stress.
Anti-Inflammatory and Immune-Modulating Strategies
Depending on the patient’s specific inflammatory and autoimmune profile, additional interventions may include:
- Low-dose naltrexone (LDN) for immune modulation
- Targeted anti-inflammatory supplementation (omega-3 fatty acids, curcumin, specialized pro-resolving mediators)
- Hormonal optimization (cortisol, thyroid) to support neurological function
Autonomic Rehabilitation
For patients with concurrent dysautonomia, our program includes autonomic retraining through breathing exercises, gradual positional training, and biofeedback — all within the patient’s tolerance and energy envelope.
What to Expect During Treatment
Our post-COVID tremor treatment program typically involves a 2-to-3-week inpatient stay at St. George Hospital. The program includes:
- Days 1–2: Comprehensive diagnostic evaluation and baseline assessments
- Days 3–14: Daily therapeutic sessions (neurofeedback, infusions, ozone, apheresis as indicated)
- Ongoing: Daily physician monitoring, treatment adjustment based on response
- Discharge: Personalized home protocol with supplement recommendations and follow-up schedule
Many patients notice improvement in tremor severity, frequency, and associated neurological symptoms during the inpatient stay, with continued improvement over the following 2 to 3 months.
Frequently Asked Questions
Are post-COVID tremors permanent?
In most cases, no. Post-COVID tremors are driven by neuroinflammation, autoimmune activity, and microcirculation impairment — all of which are potentially reversible with appropriate treatment. While some patients experience spontaneous improvement over time, targeted treatment can significantly accelerate recovery and improve outcomes. The earlier treatment begins, the better the prognosis.
How common are tremors after COVID-19?
Movement disorders, including tremors, affect an estimated 2–5% of long COVID patients, though “internal tremors” (a subjective sensation of shaking) are reported by a higher percentage. The incidence appears to be higher in patients who experienced more severe acute infections, though tremors can occur after mild illness as well (Mao et al., 2020).
What is the difference between internal tremors and visible tremors?
Internal tremors are a sensation of vibrating or shaking felt inside the body that may not be visible to an observer. They are a hallmark of post-COVID neurological dysfunction and are thought to arise from autonomic dysregulation and altered neural signaling. Visible tremors involve observable movement and may indicate more specific involvement of motor control pathways. Both types respond to our treatment approach.
Should I see a neurologist before coming to St. George Hospital?
We recommend having a basic neurological evaluation in your home country to rule out other causes of tremor (such as essential tremor, Parkinson’s disease, or medication side effects). Existing test results and medical records help us prepare your treatment plan before arrival. However, a referral is not required — you can contact our medical team directly for a preliminary evaluation.
Get Help for Post-COVID Neurological Symptoms
Post-COVID tremors can be frightening and isolating, but they do not have to be permanent. Our integrative approach addresses the root causes — neuroinflammation, autoimmunity, microcirculation impairment, and autonomic dysfunction — rather than merely suppressing symptoms.
Contact us to discuss your case:
Phone: +49 (0)8061 398-0
Email: info@clinicum-stgeorg.de
Request a consultation
This article is for informational purposes only and does not constitute medical advice. Post-COVID tremors should be evaluated by a qualified physician to rule out other causes of movement disorders.
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