U - ulcerates too early: Most brown recluse bites do not form an open sore (ulcer ... Do not continue to self-treat the spider bite wound if it becomes infected or if a boil or ulcer develops.

Although extremely rare, spider bites ... £1 coin-size gape wound on Mr Boulton’s back, which appeared to be infected. Four days prior, he had complained about a spider bite on his back ...

Loxoscelism symbolizes dermonecrotic lesions and systemic manifestations incurred by the brown recluse spider bite (Barretto, Soeiro Prestes, Figueiredo Fonseca, & Achucarro Silveira, 2007).