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Spider bites: First aid

When to seek emergency help

Seek medical care right away if:

  • You were bitten by a dangerous spider, such as a black widow or a brown recluse.
  • You're unsure if the bite was from a dangerous spider.
  • You have severe pain, stomach cramping or a growing wound at the bite site.
  • You're having problems breathing or swallowing.
  • The area of inflamed skin is spreading or has streaks.