I got bit by a spider while driving in Colorado back in 1973 or 74...felt the pinch on my butt but didn't think anything about it. It got really red and sore and oozy but went away. However now, when I get stressed out or upset or sick the exact same spot on my butt breaks out in little blisters and ozzes....the Dr said its just a weak spot in my body and the stress makes that one spot break out....glad its not other places like shingles does!! Only ran into fire ants one time in South Carolina and hope I never see another one again!!!