Yellow Sac Spider
  The chelicerae of yellow silk spiders are very powerful, and the fangs can penetrate human skin quite easily. The venom of sac spiders contains a cytotoxin - which means it kills cells - like the venom of a brown recluse. Unlike brown recluse bites which can take 2-3 months to heal, most sac spider bites heal much more quickly, although the reaction will vary greatly from individual to individual. No fatal incidents have ever been recorded.


  • Stinging sensation followed by redness and mild swelling and itching near the site
  • Redness disappears after 42 hours
  • Bite may blister and break, leaving a sore that can take several weeks to heal


  • Wash the wound and apply an antibiotic ointment
  • Seek medical attention if there are signs of an infection, an ulcer that does not heal, a bite accompanied by nausea, vomiting, fever or a rash
  • If infection develops, antibiotics are used
  • If a wound becomes deep and infected, occasionally surgery is needed
  • Anytime there is a bite or a wound that is not healing and getting worse, see your doctor