Over the past two years I've not heard this frequently from many members here and in the Yahoo Cutler groups. I just happen to be one. You might want to get a comment from one of the FDC group moderators who have been around for 5+ yrs.
Other symptoms seem to decline after the "dump" so I assume this would improve too. My situation might be complicated by the lyme infected tic that was found embedded in me last Fall.