Thanks for your query.
Itching over ankle may be due to either, ongoing compression over, irritation or, recovery of the nerve- which was apparently injured following fracture
Perception of an abnormal sensation is good sign, as it indicates that the concerned nerve is still functional.
Consult your doctor and apprise him of my opinion. I am certain that he will agree with me, order required tests, and- based on the reports- will prescribe suitable/modified treatment as advised.
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Dr. Rakesh Karanwal