All bite guides

Why do I have itchy red bumps after hiking?

Chiggers are tiny mite larvae in grass and brush. Their bites cause intensely itchy red bumps, often where clothing is tight: waistbands, sock lines, and behind the knees.

AI-generated field guide image of a chigger
AI-generated visual reference, not a real patient photo.

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What it looks like

  • Clusters of red bumps or blisters
  • Itching that peaks one to two days later

What to do

  • Shower with soap soon after being outdoors
  • Wash clothes in hot water
  • Use anti-itch cream

See a doctor if you notice

  • Signs of infection
  • Itching that disrupts sleep for days

Trouble breathing, face or throat swelling: call 911 now.

Other bite guides

Educational information only, not a diagnosis. BiteID is in alpha testing.