Compression of the nerve (or other damage) can cause drop foot.
Foot drop is caused by damage/injury to the peroneal nerve, among other things.
You need to ask your doc how the peroneal nerve was injured since, one, I wasn't present at the surgery, and two, I no longer accept Blue Cross.
That information is on a kneed to know basis.
Other people asked questions on similar topics, check out the answers they received:
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them