Chigger bites: symptoms, treatment, and when to worry
Last updated September 3, 2026.
Chigger bites are intensely itchy red bumps caused by tiny mite larvae that feed on skin, typically picked up walking through grass, brush, or woodland edges. The larvae are nearly invisible, so most people only learn they met chiggers hours later, when the itching starts. The bites are miserable but harmless, and they heal on their own.
What do the bites look like?
Clusters of small red bumps or welts, often in a line or group, concentrated where clothing fits tight: sock tops, ankles, waistbands, behind knees, and armpits. The itching is famously intense and typically starts several hours after exposure, peaking over the next day or two. One myth to bin: chiggers do not burrow into your skin. The larva feeds at the surface for a few days if undisturbed, then drops off, and by the time you itch, it is usually already gone.
What actually helps?
- Shower and wash the clothes: a hot soapy shower right after exposure removes larvae before they feed, and washing the clothes stops re-exposure.
- Treat the itch, not the bug: cool compresses, calamine or anti-itch creams, and oral antihistamines handle the symptoms while the bites heal over a week or two.
- Do not scratch: scratching is how bites get infected. Keep nails short, and cover bites with clothing if willpower fails.
- Skip the folklore: no nail polish, petroleum jelly, or bleach. The chigger is not inside you, so suffocating it is pointless, and these just irritate skin.
- Prevent the next round: insect repellent on skin and clothing, long sleeves and pants tucked into socks, and sticking to trails rather than long grass.
When is it an emergency?
Chigger bites alone are never an emergency. Get a same-day or next-day review for infection signs: spreading redness or warmth, increasing pain, pus, red streaking, or fever. In some regions overseas, related mites transmit scrub typhus, so a bite followed days later by fever, headache, and body aches after travel in Asia or the Pacific deserves prompt mention of the exposure. Pymander's escalation routing is built and tested specifically for this class of decision; see the safety architecture working paper.
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Common questions
Do chiggers burrow into your skin?
No, this is the most durable myth about them. The larva pierces the skin surface, injects digestive fluid, and feeds from the surface for up to a few days, then drops off. The intense itch comes from your reaction to that digestive fluid, and by the time the itching peaks, the chigger is usually long gone. Nothing needs suffocating, digging out, or painting over.
How long do chigger bites last?
The itching peaks over the first day or two and the bumps generally settle within one to two weeks. Scratching stretches that out by damaging skin and risking infection. If bites are still angry or worsening after two weeks, or new bumps keep appearing without new outdoor exposure, get a review to check for infection or a different cause like fleas or bedbugs.
Where do chiggers live and how do you get bitten?
They live in grassy, brushy, and wooded areas, concentrated in long grass, leaf litter, and vegetation edges, most active in warm months. The larvae wait on vegetation and climb aboard when you brush past, then wander to a spot where clothing is snug. You do not feel the attachment, which is why the exposure and the itch are separated by hours.
What is the fastest relief for chigger bites?
A hot soapy shower right after exposure prevents many bites entirely. For established bites: cool compresses, calamine or anti-itch lotions, and oral antihistamines for the itch, plus short nails and hands off. Over-the-counter hydrocortisone cream can calm angrier spots. The honest truth is the itch outlasts most remedies, so combine a few and prevent scratching while time does the work.
Do chiggers spread disease in the US?
North American chiggers are not known to transmit disease to people; their harm is the itch and the infection that scratching can cause. In parts of Asia and the Pacific, related trombiculid mites transmit scrub typhus, a serious bacterial illness. Fever, severe headache, and body aches days after mite bites in those regions is a get-checked-now pattern, and the travel history is the key detail to report.
How do I keep chiggers off me outdoors?
Repellent containing DEET or picaridin on skin, permethrin-treated clothing, long pants tucked into socks, and staying on trails rather than crashing through brush. Afterward, shower promptly with soap, scrub with a washcloth, and wash the clothes in hot water before wearing them again. The shower-and-laundry step is the highest-value habit, since larvae take hours to settle in and feed.