Symptoms
If you have symptoms — see a doctor.
Don't wait. Early Lyme disease is far easier to treat than late-stage disease. If you were recently in tick habitat or had a tick bite, speak with your healthcare provider today.
How Symptoms Progress
Lyme disease symptoms typically unfold in stages, though not everyone follows the same progression. Some people skip stages; others have no early symptoms before developing more serious complications. This variability is one key reason Lyme disease is so frequently missed or misdiagnosed — with the average patient seeing multiple providers over two or more years before receiving an accurate diagnosis.
Days 3–30
First signs of infection
The earliest and most distinctive sign is erythema migrans (EM) — a slowly expanding rash that appears at the tick bite site. Flu-like symptoms often accompany it.
Days 7–30+
Bacteria spreads through the body
As bacteria travel through the bloodstream, they can affect multiple organ systems. Multiple rashes, neurological symptoms, and cardiac changes may emerge.
Months Later
Systemic effects in untreated or undertreated disease
Months after untreated infection, severe joint inflammation (especially in the knees), cognitive difficulties, and peripheral neuropathy may develop.
The Erythema Migrans (EM) Rash
The EM rash is the hallmark early sign of Lyme disease, appearing at the tick bite site within 3–30 days. It typically expands slowly over days to weeks, often reaching 5 to 30 centimeters in diameter. While it classically has a bull's-eye appearance with central clearing, many rashes are uniformly red without the distinctive pattern. The rash is generally:
- Flat or slightly raised and warm to the touch
- Rarely painful or itchy (though this can vary)
- Often appearing in hidden locations: scalp, armpit, groin, behind the knee
Important: 20–30% of People Never Develop the Rash
Do not rule out Lyme disease based on the absence of a rash. Some rashes occur in locations that are difficult to see. Other patients simply do not develop one. Always monitor for symptoms following tick exposure.
Symptoms in Children
Children experience Lyme disease similarly to adults, but certain effects may be more pronounced. Facial nerve palsy (drooping on one side of the face), declining school performance, behavioral changes, and fatigue may appear before other classic symptoms. See our dedicated Children & Teens page.