Rosebuds1981, an About.com First Aid reader, submitted this picture of a bite on her arm that landed her in the hospital. In her submission, she writes how she caught the spider in the act:
I was just getting out of the shower and had wrapped my towel around me when I felt something sting my arm. That's when I brushed the spider off my arm and saw it fall to the floor. That happened about eleven o'clock pm.
The next day it was itching but I had no pain. By the third day it hurt a little, but by the fourth day my whole arm was throbbing.
Catching a spider in the act is rare. Usually, the victim doesn't even know the spider was around. Even though this reader saw a spider and believes it fell from her arm, there is still the possibility this is something else entirely. When it's this swollen, a trip to the doctor is a good idea.
This picture was submitted by an About.com reader. Submit your own spider bite picture here.
Any opinions expressed here are for educational purposes only and are not intended for diagnosis.