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Managing arthropod bites and stings.

Most arthropod bites and stings cause limited swelling, itching, pain, and redness and can be managed by ice application and tetanus prophylaxis as necessary. Stings by bees, wasps, and stinging ants can cause anaphylaxis that may require treatment with epinephrine and antihistamines and respiratory and cardiac maintenance measures. Widow spider bite management is controversial, but interventions for systemic reactions include calcium gluconate, methocarbamol, diazepam, narcotics, and antivenom. Victims of brown spider bites may need hospitalization if lesions enlarge rapidly or there are signs of systemic poisoning. Those stung by a bark scorpion may require oxygen, an intravenous line, pulse oximetry, and cardiac monitoring.