my mother has had a virus for the past 6 weeks and has chronic fatigue. she had a slight temperature which is gone now. no headaches, swollen joints, or other pain. just chronic fatigue and now a rash all over her body (not her face) and her hands are a little shakey...also, her mouth is dry. the doctors say they have no idea what it is. her blood tests are normal. is it lupus? what could it be? please help - she is worried.

Did her doctor specify what type of viral infection she had? There are hundreds of different viruses, each with its own peculiarities.

Here's a link to MedLinePlus to get you started - 310 search results for 'viral infection':
http://wwwindex.nlm.nih.gov/cgi/htsearch?config=medplus%5Ffuzzy&method=and&format=builtin%2Dshort&restrict=&words=viral%20infection&spell=spell&x=10&y=13&search_type=All%20MEDLINEp lus&WSSCheckFieldName=words&action_spell=Check%20Spelling&WSSUserDictFileName=&WSSOptions=303872&WSSLanguage=24941