What are the symptoms of Lyme disease?

Symptoms of Lyme Disease

Lyme disease presents with distinct symptoms that vary by stage: early localized disease is characterized by erythema migrans (a gradually expanding rash >5 cm) occurring in 50-80% of patients along with flu-like symptoms; early disseminated disease manifests as neurologic complications (facial palsy, meningitis), cardiac involvement, or multiple skin lesions; and late disseminated disease primarily causes intermittent large-joint arthritis, especially of the knee. 1

Early Localized Disease (Days to Weeks After Tick Bite)

Skin Manifestations:

• Erythema migrans (EM) is the hallmark sign, appearing in 70-80% of patients as a gradually expanding annular lesion >5 cm in diameter 2
• The rash expands outward from the tick bite site and can grow to 20 cm in radius 1, 3
• The coloration may initially be uniform, then develop the classic "bull's-eye" pattern with central clearing 3, 4
• Typical incubation period is 7-14 days (range 3-30 days) after tick bite 1

Systemic Symptoms:

• Fever, malaise, and fatigue 1
• Headache 1
• Myalgias (muscle aches) 2
• Arthralgias (joint pain) 2
• Regional lymphadenopathy 1

Critical Pitfall: Only 25% of patients recall the tick bite, and 20-50% never develop the characteristic rash, making diagnosis challenging in these cases 3, 1

Early Disseminated Disease (Weeks to Months After Infection)

Neurologic Manifestations:

• Facial nerve palsy (Bell's palsy) - can be bilateral 2, 1
• Lymphocytic meningitis 1
• Radiculoneuritis (nerve root inflammation) 1
• The classic triad includes meningitis, cranial neuropathy, and motor/sensory radiculopathy (Bannwarth syndrome) 3

Cardiac Manifestations:

• Myocarditis and pericarditis 2, 1
• Transient atrioventricular heart block of varying degree 1
• Symptoms include dyspnea, edema, palpitations, lightheadedness, chest pain, and syncope 2
• Exercise intolerance and presyncope may occur 2

Skin Manifestations:

• Multiple or secondary erythema migrans lesions at sites distant from the original tick bite, indicating spirochetemia 1, 3

Musculoskeletal:

• Migratory joint and muscle pains with or without objective joint swelling 1

Late Disseminated Disease (Months to Years After Infection)

Musculoskeletal:

• Intermittent swelling and pain of one or several large, weight-bearing joints (especially the knee) is the most common late manifestation 1
• Large knee effusions that are disproportionate to the amount of pain are typical 1
• Mono- or oligoarticular arthritis develops in untreated patients 5
• Approximately 10% develop persistent joint swelling even after appropriate antibiotic treatment 1

Neurologic (Uncommon in United States):

• Chronic axonal polyneuropathy presenting as mild, diffuse "stocking-glove" neuropathy with intermittent limb paresthesias and reduced vibratory sensation in distal lower extremities 1
• Encephalopathy manifested by cognitive disorders, sleep disturbance, fatigue, and personality changes 1
• Peripheral neuropathy or encephalomyelitis 2

Skin (More Common in Europe):

• Acrodermatitis chronica atrophicans (ACA) can develop 0.5-8 years after initial infection 6, 3

Post-Treatment Symptoms

• Subjective symptoms may persist for weeks to months after appropriate treatment due to slow resolution of inflammatory processes, not persistent infection 1, 6
• Approximately 35% of patients have symptoms at day 20,24% at 3 months, and 17% at 12 months after treatment 1, 6
• An ill-defined post-Lyme disease syndrome occurs in some persons after treatment 1

Key Diagnostic Considerations

When to Suspect Lyme Disease:

• Patients with EM rash and epidemiologically plausible tick exposure in endemic areas (northeast and upper midwest United States) can be diagnosed clinically without laboratory testing 2
• All other manifestations require serologic testing for confirmation 2

Laboratory Testing Limitations:

• Two-tiered serologic testing has low sensitivity (30-40%) during early infection while antibodies are developing 2
• Sensitivity increases to 70-100% for disseminated disease 2
• Specificity remains high (>95%) during all stages 2

Critical Pitfall: Some infected persons remain asymptomatic or manifest only nonspecific symptoms without the characteristic rash, making diagnosis more challenging 1. Early diagnosis and treatment are essential to prevent progression to late-stage complications that require more intensive therapy 1.