How long does a bump persist after a tick bite? - briefly
A skin reaction from a tick bite usually resolves within a few days to two weeks; persistent swelling beyond three weeks may indicate infection or other complications. If the bump does not improve or worsens, seek medical evaluation.
How long does a bump persist after a tick bite? - in detail
The skin’s reaction to a tick attachment typically begins as a small, red papule at the bite site. In most healthy individuals the raised area resolves within a few days, often disappearing between three and seven days after the tick is removed. Occasionally the lesion persists for up to two weeks, especially if the bite was prolonged or the host’s immune response is slower.
Factors that extend the duration include:
- Tick species – certain ticks inject more saliva, provoking a stronger local inflammation.
- Length of attachment – longer feeding periods increase the amount of irritant proteins deposited.
- Host sensitivity – allergic or immunocompromised persons may experience prolonged swelling.
- Secondary infection – bacterial colonisation can turn a simple papule into a pustule or ulcer that lasts weeks.
- Incomplete removal – retained mouthparts can maintain irritation and delay healing.
Typical progression:
- 0–24 h – erythema and mild swelling appear; the bump may feel tender.
- 2–5 days – peak size; the lesion may become a vesicle or crust.
- 5–10 days – gradual reduction in redness and elevation; itching may occur.
- 10–14 days – most lesions fade completely; any residual discoloration usually resolves within a month.
Warning signs that merit medical evaluation:
- Expansion beyond the original site or a rapidly enlarging rash.
- Central clearing with a red outer ring, suggestive of erythema migrans.
- Fever, headache, muscle aches, or joint pain accompanying the skin change.
- Persistent ulceration, pus, or increasing pain after two weeks.
If the bump does not improve within two weeks, or if systemic symptoms develop, professional assessment is recommended to rule out tick‑borne infections such as Lyme disease, Rocky Mountain spotted fever, or tularemia. Early treatment can prevent complications.