Psychiatric Symptoms of Lyme Disease

Psychiatric symptoms of Lyme disease can occur when infection affects the brain and nervous system. Patients may experience anxiety, depression, irritability, or changes in mood and behavior as part of the illness.

These symptoms can develop early in Lyme disease or appear later when infection is not recognized and treated promptly. Because psychiatric symptoms occur in many medical conditions, Lyme disease may initially be overlooked during the diagnostic process.

This page highlights common psychiatric and behavioral manifestations associated with Lyme disease and links to clinical articles discussing these symptoms in greater detail. For a broader overview of symptoms affecting multiple body systems, see the Lyme disease symptoms guide.

Common Psychiatric Symptoms of Lyme Disease

Anxiety
Depression
Irritability or mood swings
Panic attacks
Sleep disturbance
Difficulty concentrating
Behavioral changes

Some patients also develop cognitive symptoms such as memory problems and slowed thinking, which may overlap with brain fog and other neurologic symptoms of Lyme disease.

In children, sudden psychiatric or behavioral changes may occur as part of Pediatric Acute-onset Neuropsychiatric Syndrome (PANS), a condition that can be triggered by infection and may include abrupt anxiety, obsessive-compulsive behaviors, mood instability, or cognitive decline.

Psychiatric Symptom Patterns

Psychiatric symptoms in Lyme disease often occur alongside neurologic and systemic symptoms. Patients may experience overlapping patterns involving mood regulation, cognitive processing, sleep disturbance, and autonomic nervous system instability.

Mood symptoms – anxiety, depression, irritability, or emotional lability that may fluctuate with other Lyme symptoms.
Cognitive symptoms – slowed thinking, poor concentration, and memory problems that overlap with brain fog.
Sleep disturbance – insomnia, non-restorative sleep, or disrupted sleep cycles that contribute to fatigue.
Behavioral changes – personality changes, impulsivity, or difficulty regulating emotions.

Articles on Psychiatric Symptoms of Lyme Disease

Why Psychiatric Lyme Disease Is Often Misdiagnosed

Psychiatric symptoms caused by Lyme disease can resemble many other conditions including primary anxiety disorders, depression, bipolar disorder, or stress-related illness. When patients present primarily with mood or behavioral symptoms, Lyme disease may not be considered.

To learn more about these diagnostic challenges, see our page on Lyme disease misdiagnosis.

Related Hubs

Editor’s note: In my clinical experience, psychiatric symptoms can be among the most confusing manifestations of Lyme disease and may lead to delayed diagnosis when infection is not considered.

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

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