Do you know it's just sprained? Maybe a pinched nerve.
Hi it may do you good to get a Scan done or a Xray done on your Ankle , you can't be to sure , Take care ,
I've sprained my ankle several times and I've gotten that feeling before. I never did anything for it. When I sprained my wrist, I wore a tight brace, and didn't get that feeling. If you don't have one, maybe try getting an ankle brace, it may help