Every time I have surgery a week to a week and a half later I experience very itchy hives up and own my arms, my legs, my neck, my scalp, my chest, and my palms of my hands. After my c-sections I would also have a circle of rash about one inch in diameter around where they did my epidural or spinal. They tried both to see if the reaction would be different. I would react right away in the hospital and they would give me benadryl but once home about a week to a week and a half later I would have a reaction again every time. That's five times by the way. Now I've had two uterine ablations done and did not have the reaction right away in the hospital but a week and two days later both times! It's very itchy and uncomfortable and would love some insight as to what would be causing it so I can avoid it in the future. I did take vicodin after all of my surgeries but was finished a week before my reaction. Can you have such a delayed reaction from vicodin or could it be lidocaine I'm allergic to?