My husband sat in an ant mound accidentally about three weeks ago and sustained approx 30 fire ant bites to his left ankle and foot. We treated the bites at home. this occurred 3 weeks ago. Last week he started complaining of pain and swelling in his groin, thinking it was a hernia he went for an ultrasound this week and the doctor called today to say it is a swollen lymph node. Is it possible/highly probable that the fire ant bites caused the swelling?