Forget about the name CFS as it is a bogus invention and not a recognised diagnosable illness.
Research M.E. instead for factual information.
Here is a link:
http://www.hfme.org/themesymptomlist.htm
And a quote from the symptoms list:
Transient tingling, numbness and/or burning sensations (or other odd sensations) in the face or extremities (paresthisias).