Neuropsychiatric Lyme Disease: Symptoms and Cognitive Changes

Lyme disease may affect mood and cognition.
Brain fog, anxiety, and memory problems are common concerns.
Careful medical evaluation remains important.

Neuropsychiatric Lyme disease refers to mood, cognitive, and behavioral symptoms that may occur when Lyme disease affects neurologic, immune, or inflammatory pathways.

Patients may present with depression, anxiety, brain fog, irritability, panic symptoms, memory problems, or changes in school and work performance. These symptoms can be especially confusing when physical signs are subtle or Lyme testing is negative or incomplete.

This page serves as a hub for understanding neuropsychiatric Lyme disease symptoms, why they are often missed, and how they may overlap with neurologic Lyme disease, autonomic dysfunction, and persistent symptoms after treatment.

For a broader overview of symptom patterns across Lyme disease, visit our Lyme Disease Symptoms Guide.

Mood Symptoms in Neuropsychiatric Lyme Disease

Some patients with Lyme disease report new or worsening mood symptoms, including:

• Depression
• Anxiety
• Irritability
• Emotional lability
• Loss of motivation
• Episodes of panic or internal agitation

These symptoms may be mistakenly treated as a primary psychiatric disorder when the broader medical picture is not considered. Teenagers may be especially vulnerable to delayed recognition of mood-related symptoms associated with Lyme disease.

Cognitive Symptoms and Brain Fog

Cognitive symptoms are among the most common concerns reported by patients with neurologic or persistent Lyme disease.

Patients may describe:

• Brain fog
• Memory problems
• Word-finding difficulty
• Slowed processing
• Poor concentration
• Difficulty completing school or work tasks

These symptoms can affect daily function even when routine neurologic testing appears normal. Cognitive problems are commonly reported in Neurologic Lyme Disease and persistent illness after treatment.

Behavioral and Psychiatric Changes

In some patients, Lyme disease may be associated with behavioral changes that are difficult to interpret without considering infection, inflammation, or neurologic involvement.

Symptoms may include:

• Panic attacks
• Intrusive thoughts
• Sleep disruption
• Agitation
• Personality changes
• School refusal or withdrawal

When these symptoms appear suddenly or alongside fatigue, pain, headaches, dizziness, or neurologic complaints, a broader medical evaluation may be warranted.

Case Reports Highlight Diagnostic Challenges

In their article, Differentiating Psychosomatic, Somatopsychic, Multisystem Illnesses and Medical Uncertainty, Bransfield and Friedman described patients with severe multisystem illness who were initially dismissed as having psychiatric or psychosomatic conditions before later being diagnosed with Lyme disease.

One case involved an athletic 18-year-old female who developed a bull’s-eye rash followed by Bell’s palsy and progressive neurologic decline over several years.

Her symptoms included:

• Attention and memory impairment
• Slowed processing speed
• Tactile hypersensitivity
• Orthostatic hypotension
• Weight loss
• Non-restorative sleep
• Headaches
• Peripheral neuropathy
• Generalized pain
• Seizures

Clinicians reportedly labeled her symptoms as fibromyalgia, chronic fatigue syndrome, hypoglycemia, pseudoseizures, and “wanting attention” before a more extensive neurologic evaluation was completed.

According to the authors, treatment ultimately led to substantial functional recovery.

A second pediatric case described a 12-year-old girl with headaches, loss of balance, jerking movements, seizures, and progressive neurologic deterioration.

One clinician reportedly diagnosed “hysteria” or conversion disorder before further evaluation identified encephalitis and possible Lyme-associated neurologic disease.

The patient later improved after intravenous antibiotic therapy.

These reports highlight how multisystem neurologic illness may sometimes be mistaken for primary psychiatric disease when symptoms are complex or poorly understood.

Pediatric Neuropsychiatric Lyme Disease

Children and teenagers may not describe symptoms the same way adults do.

Instead, families may notice:

• Declining grades
• Loss of stamina
• New anxiety or depression
• Irritability or anger
• Sleep problems
• Difficulty concentrating
• Withdrawal from sports or social activities

These changes are sometimes attributed to stress, adolescence, ADHD, or depression alone. In some cases, Lyme disease or another tick-borne infection may be part of the picture.

Learn more about symptom patterns in Pediatric Lyme Disease.

Why Neuropsychiatric Lyme Disease Is Often Missed

Neuropsychiatric Lyme disease can be missed because symptoms overlap with many common psychiatric and neurologic conditions.

Common reasons include:

• No recalled tick bite
• No visible rash
• Negative or incomplete testing
• Symptoms attributed to stress or depression
• Fragmented care across multiple specialists

This is one reason careful history, symptom timing, exposure risk, and associated physical symptoms remain important.

Delayed or missed diagnosis may also contribute to prolonged symptoms and unnecessary psychiatric labeling. Learn more about Lyme disease misdiagnosis.

Possible Mechanisms Behind Neuropsychiatric Symptoms

Researchers continue studying why some patients develop mood, cognitive, or behavioral symptoms with Lyme disease.

Possible contributors include:

• Neuroinflammation
• Immune activation
• Cytokine and chemokine signaling
• Autonomic dysfunction
• Persistent symptoms after treatment
• Co-infections that complicate recovery

Immune markers such as CCL19 are being studied as possible clues to why some patients remain symptomatic after treatment.

Some patients with panic symptoms, dizziness, palpitations, or exercise intolerance may also have overlapping autonomic dysfunction.

Frequently Asked Questions

Can Lyme disease cause psychiatric symptoms?

Yes. Some patients report depression, anxiety, irritability, panic symptoms, or cognitive changes during Lyme disease or persistent illness after treatment.

What is neuropsychiatric Lyme disease?

Neuropsychiatric Lyme disease refers to mood, cognitive, or behavioral symptoms associated with neurologic or immune effects of Lyme disease.

Can Lyme disease cause brain fog?

Yes. Brain fog, memory problems, and slowed processing are commonly reported in neurologic and persistent Lyme disease.

Can Lyme disease symptoms look like depression?

Yes. In some patients, fatigue, cognitive decline, sleep disruption, and mood changes may resemble depression or anxiety.

Should psychiatric symptoms still be treated?

Yes. Psychiatric symptoms deserve appropriate support and treatment while clinicians also evaluate possible medical contributors.

Clinical Takeaway

Neuropsychiatric Lyme disease should be considered when mood, cognitive, or behavioral symptoms appear alongside fatigue, pain, dizziness, neurologic complaints, tick exposure, or a fluctuating illness pattern.

These symptoms do not prove Lyme disease by themselves. But they should not automatically be dismissed as psychiatric illness alone.

Recognition matters because earlier evaluation may help prevent prolonged disability, missed diagnoses, and unnecessary delays in care.

Important Support

If you or someone you know is experiencing suicidal thoughts, seek help immediately.

• Call or text 988 — the Suicide & Crisis Lifeline
• Call 911 or go to the nearest emergency room if there is immediate danger
• Reach out to a trusted family member, friend, or healthcare professional

Related Articles

Recovery From Lyme Disease
Lyme Coinfections
Prevention of Lyme Disease
Post-Treatment Lyme Disease Syndrome
Persistent Lyme Disease
Delayed Lyme Disease Diagnosis

References

1. Bransfield RC, Friedman KJ. Differentiating Psychosomatic, Somatopsychic, Multisystem Illnesses and Medical Uncertainty. Healthcare. 2019;7(3):114.

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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