All bite guides

What does a brown recluse bite look like?

Brown recluse spiders live mainly in the south-central US. Most bites heal on their own, but some form a painful sore that needs medical care. Many suspected spider bites are actually skin infections.

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

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What it looks like

  • Little pain at first, then a red, painful area within hours
  • A pale or purple center with a red ring
  • Some bites form a blister or open sore over days

What to do

  • Wash, apply cold, and raise the limb
  • Save the spider if safely possible

See a doctor if you notice

  • A darkening or growing sore
  • Fever, rash, or dark urine
  • Any bite in a young child

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

Other bite guides

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