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