well the
numbness that you have after an ankle sprain
is brought about by 2 factors
1) after an injury, the swelling compresses the circulation to the
nerve and the nerve itself - so expect the symptoms to disappear together with the swelling
2)stretching and
compression injury to the nerves in your ankle that was caused by the ankle sprain itself.
so expect spontaneous recovery in your case.
the most you can have is an anti inflammatory medication
timeframe for simple ankle sprain recover is 1 to 2 weeks
ankle sprain automatically means you injured your ligaments (hence the term sprain)
injury can be in a form of overstretching to complete ligament tear. this can be further investigated
once the pain and swelling subsidse and if you feel like you tend to sprain your ankle more frequently than before your injury. chances are you have a partial or completely torn ligament.
merry christmas :)