What Does a Brown Recluse Spider Bite Look Like?

benjaminjk/iStock / Getty Images Plus/Getty Images

The bite of a brown recluse spider causes mild redness at the affected site; upon close inspection, fang marks can be seen, notes WebMD. Typically, the bite is painless, with symptoms developing during the course of 2 to 8 hours, including the formation of a bull's eye lesion that looks as if it flows downhill after several hours pass. The center then forms a blister within 12 to 48 hours, sinks in and turns blue before turning black; this signifies death of tissue.