The female black widow is easily recognized by her shiny black body and red hourglass marking underneath her round abdomen. Although black widows can be found in nearly every state they are most common in the southern areas of the United States. The black widow makes her home in wood piles, under eaves, and other undisturbed places. The bite of a black widow can be serious and require medical attention. Symptoms include pain radiating from the site of the bite, nausea, overall aching of the body, profuse sweating, and labored breathing.
Update Date 1/13/2014
Updated by: Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.