Sleepless in Chattanooga

The incredible itching I've been having on my feet and ankles has been waking me up about an hour or so after going to bed.  Then I'm up for an hour or two, taking Benadryl and applying astringents and various lotions and oils.  I have my physical exam scheduled in ten days, so maybe the doc can help with this.  I hope we can find out what's causing this and what I can do to alleviate the itching.