Went to macys parade. cold and windy. tip of middle finger is still numb . do i have permanent nerve damage? what should i do? no dis colorization.

Very unlikely. I --: Would be inclined to check you for a carpal tunnel syndrome, as that's a much commoner problem. It probably just coincidental that it started with going to the macy's. If there is no discoloration, then it not likely a vascular (due to blood vessel's problems). Is there pain with it? Have you ever had it before? See your pcp and get nerve conduction studies done. Use wrist brace regularly.