kehorner

If there is a lot of swelling, it can compress the nerves that supply the skin, causing numbness. So the numbness is probably just a side effect of the swelling. If this is the case, it may take a few weeks, but the feeling should gradually come back once the swelling goes down.

The more important question is why there is so much swelling. It could just be a whole lot of soft-tissue bruising and swelling. But it's possible that something is broken.

Rest, keep it elevated, and ice it a lot (20 minutes every hour). The swelling should go down and pain should dissipate in a few days if it's nothing serious. If it doesn't improve soon (as far as the swelling and pain), it's time to see a doctor. Also, if the numbness gets worse or doesn't start to get better in 2-3 weeks, you should probably check with the doctor.

I had a spot on each foot go numb after I did a big walk, because my feet had swollen in my shoes. The swelling wasn't even noticable looking at the outside of the feet, but it was obviously swollen inside. The feeling came back I think in about 2 weeks, maybe 3 or 4. It's a gradual thing.