I didn't have drop foot or peripheral neuropathy until i had gastric bypass in 2003. how could/why did this happen? i just want to walk how i used to

Interesting: This is a bit unusual. Gastric bypass involves deep surgery and it is important to talk with your gastric surgeon about the technique he/she used in doing your surgery. Using instruments inside the abdomen may have come in contact with a nerve. I would suggest that you talk things over with your surgeon. My question is also why have you waited 4 years to bring this up??

Neurologist: If you have not already, you should see a neurologist for a work up. One common scenario after this type of surgery is a vitamin B 12 deficiency, which can result in foot drop. You may want to ask whether that can be checked. There are many other possibilities also which need evaluation. Good work.