Brown Recluse Spider Description Also called Violin or Fiddleback Spider. A brown spider no larger than a quarter, with a dark brown violin shape on its back. Bite Site Red rings around black blister, appears infected. Swollen & painful. Takes a long time to heal completely. Possible Symptoms Fever, chills, nausea and vomiting, itching, brown urine. Recommended Treatment Protocol Cleanse with soap & water. Emergency department or physician for tetanus booster or wound treatment if needed. POISON TOPICS × Poisoning PreventionSubstances of AbuseHerbal ProductsVenomous Critters Ants & Fire Ants Bees, Wasps & Hornets Florida Scorpions Coral Snake Pit Vipers Black Widow Spider Brown Recluse Spider Stinging Caterpillars Aquatic Vertebrates Aquatic InvertebratesPoisonous PlantsCarbon MonoxideFood SafetyOlder Adults