What does a bite from an infected tick look like? - briefly
A tick bite that transmits disease often shows a tiny red puncture surrounded by a faint, sometimes reddish, halo. Development of a raised, warm, expanding rash—especially a concentric “bullseye” pattern—suggests infection such as Lyme disease.
What does a bite from an infected tick look like? - in detail
A bite from a pathogen‑carrying tick typically begins as a small, painless puncture at the site of attachment. Within hours to a few days, the following signs may become evident:
- A red, circular or oval macule measuring 2–5 mm in diameter, often centered on the tick’s mouthparts.
- A clear or slightly raised central point where the tick was inserted, sometimes visible as a tiny punctum.
- Progressive enlargement of the lesion over several days, forming a “bull’s‑eye” pattern: a red outer ring surrounding a paler inner area, characteristic of early Lyme disease (erythema migrans).
- Accompanying symptoms such as mild itching, warmth, or a faint burning sensation; systemic signs like fever, headache, or fatigue may appear later if infection spreads.
In some cases, the initial erythema remains a uniform red spot without a target appearance, especially with infections other than Borrelia burgdorferi. The lesion may persist for weeks, slowly expanding up to 12 cm or more, while the central punctum often becomes less distinct. Absence of immediate pain does not rule out pathogen transmission; the tick’s saliva contains anesthetic compounds that mask discomfort.
If any of these visual changes occur after a recent outdoor exposure, prompt medical evaluation is recommended to confirm infection and initiate appropriate antimicrobial therapy.