after gallbladder surgery sever swelling face and arms, and upper lip for 2 years,,,,,,hospital and a allergist can't found cause, it started in the recovery room with tongue swelling, next 4 weeks twice a week side of face and upper lip extreme swelling, now it happens once twice a month, they did a panel to see what I might be allergic to and only found maple tree, I lived in Seattle and now Billings montana no maple trees. I have been given benedril 180 mil.