"unexplained generalized body ache"

"What Did I Do Yesterday?" When Your Whole Body Aches for No Reason, It Is Your Body's SOS Signal

Did you wake up this morning feeling sore and stiff all over, even though you clearly did nothing strenuous last night? As if someone had beaten your body all night long, you tilt your head at the unexplained pain and wonder, 'What did I do yesterday?' This is a quiet SOS signal sent by your body.