Scabies rash

A scabies rash usually shows up as tiny red bumps with thin grey-white burrow lines a few millimetres long, red bumps, pale burrows, appearing 2 to 6 weeks after first exposure; within days on re-exposure. It peaks around progressive and generally lasts until treated — it does not resolve on its own. Symmetrical, in finger webs, wrists, waistline, armpits and groin is the usual arrangement.

How to tell it apart

Scabies is not really a bite — it is an infestation of the skin's surface layer, and the pattern is what identifies it: symmetrical, in skin folds, worst at night, and shared by more than one person in the household. The short grey burrow lines between fingers are the specific finding when they can be seen.

Where and when you meet it

Habitat: transmitted by prolonged skin-to-skin contact — households, care homes, sexual contact; not from pets.

Across 390 verified US records in the GBIF biodiversity database, sightings of Sarcoptes scabiei concentrate in 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

• Indiana 90 records
• Massachusetts 17 records
• New York 17 records
• California 13 records
• New Jersey 8 records
• Hawaii 7 records
• Maryland 7 records
• Colorado 5 records
• Ohio 5 records
• Texas 5 records
• Illinois 2 records
• Michigan 2 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

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

Itch continues for two to four weeks after successful treatment because the reaction is to the mite proteins, not to living mites. That lag drives people to repeat treatments unnecessarily. Persistent new burrows, not persistent itch, is what indicates treatment failure.

Associated illnesses in the US

• secondary bacterial skin infection is common from scratching

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.

Care at home

1. this needs prescription treatment — permethrin cream or oral ivermectin
2. treat every household member at the same time, symptoms or not
3. wash bedding and clothing at 60°C and tumble dry; seal what cannot be washed for 72 hours

Preventing the next one

• treat contacts simultaneously
• avoid sharing bedding and towels during treatment