Lone star tick bite
A lone star tick bite usually shows up as a firm itchy bump, often more irritated than other tick bites, red, occasionally with a central crust, appearing within hours of attachment. It peaks around days 1 to 3 and generally lasts up to two weeks; itch can outlast the mark. Single, sometimes dozens at once when larval "seed ticks" swarm is the usual arrangement.
| Looks like | a firm itchy bump, often more irritated than other tick bites |
|---|---|
| Pattern | single, sometimes dozens at once when larval "seed ticks" swarm |
| Size | 3–40 mm |
| Appears | within hours of attachment |
| Worst at | days 1 to 3 |
| Lasts | up to two weeks; itch can outlast the mark |
| Itch | ●●●●○ 4/5 |
| Pain | ●○○○○ 1/5 |
| Usually on | legs, waist, groin, anywhere brushed against low vegetation |
| Active | March to September, daytime; this species actively hunts and will walk towards a host |
How to tell it apart
The adult female carries a single white dot on her back — the "lone star" — which makes this the one tick most people can identify without a microscope. Bites tend to itch far more than blacklegged tick bites, and the larval stage arrives in swarms: dozens of pinpoint bites over the legs and waist after a single walk is characteristic.
Where and when you meet it
Habitat: woodland edges and dense undergrowth across the Southeast, East and lower Midwest.
Across 30,011 verified US records in the GBIF biodiversity database, sightings of Amblyomma americanum concentrate in April to July. That is the window when bites are most likely — it is observation data rather than a guess, and it shifts with latitude.
States with the most recorded sightings
- Kansas 8,347 records
- Florida 4,044 records
- Tennessee 2,638 records
- Alabama 2,337 records
- Maryland 1,872 records
- Virginia 1,426 records
- Missouri 829 records
- New Jersey 813 records
- Oklahoma 412 records
- North Carolina 360 records
- Kentucky 356 records
- Texas 334 records
Record counts reflect where people report and identify specimens, not exact abundance. They are useful for ruling a species in, not for ruling it out.
Where it is recorded
| Country | Records | Peak months there |
|---|---|---|
| United States | 30,011 | May to July |
| Canada | 37 | May to July |
Verified records from the GBIF biodiversity database across the seven countries we cover. A country missing from this table means we have no records for it, not that the species is absent.
What it means for you
This is the tick behind alpha-gal syndrome, a delayed allergy to red meat that can begin months after a bite. Symptoms appear three to six hours after eating beef, pork or lamb, which is long enough that most people never connect the two. If that pattern fits, it is worth raising specifically with a clinician.
Associated illnesses in the US
- ehrlichiosis
- Heartland virus
- tularemia
- STARI
- alpha-gal syndrome (red meat allergy)
Most bites transmit nothing. What matters is the follow-up: note the date, and report any fever or rash in the following weeks to a clinician along with the fact that you were bitten.
Seek medical care if
- fever and headache within two weeks of a bite
- hives, stomach cramps or anaphylaxis hours after eating red meat — the alpha-gal pattern
- a spreading rash
Care at home
- remove with fine-tipped tweezers, steady upward pull
- wash and record the date
- for a swarm of seed ticks, a warm shower and a lint roller on clothing removes what tweezers cannot
Preventing the next one
- permethrin-treated clothing
- avoid sitting directly on logs and leaf litter
- tick check within two hours, including the waistband
Common questions
How do I know it was a lone star tick?
The adult female carries a single white dot on her back — the "lone star" — which makes this the one tick most people can identify without a microscope. Bites tend to itch far more than blacklegged tick bites, and the larval stage arrives in swarms: dozens of pinpoint bites over the legs and waist after a single walk is characteristic.
How long does a lone star tick bite last?
Typically up to two weeks; itch can outlast the mark, peaking around days 1 to 3.
When is it a problem?
Seek care for: fever and headache within two weeks of a bite; hives, stomach cramps or anaphylaxis hours after eating red meat — the alpha-gal pattern; a spreading rash.
Can it transmit disease?
In the United States this species is associated with ehrlichiosis, Heartland virus, tularemia, STARI, alpha-gal syndrome (red meat allergy). Most bites transmit nothing, but symptoms in the weeks after a bite are worth reporting to a clinician.
Get a photo assessment in the app
Everything above is free to read. The app adds what a page cannot: point your camera at the bite and get an assessment of the most likely cause, a severity read, and a day-by-day care plan — including the specific signs that mean you should be seen.
iPhone and iPad. Free to download.