You had a tick bite, especially in a Lyme-endemic area
You noticed a rash that expands over days to weeks, often shaped like a bull’s-eye, but not always
You have flu-like symptoms after a tick bite, such as fever, chills, fatigue, headache, or body aches
You have joint pain or swelling, especially in the knees
You have muscle aches or neck stiffness
You have swollen lymph nodes
You have facial droop or weakness on one side of the face
You have numbness, tingling, or shooting pains
You have heart palpitations, dizziness, or fainting
Your symptoms started days to weeks after possible tick exposure
A healthcare provider can confirm it with exam and blood tests, especially if symptoms fit Lyme disease