1) Aching 2) Acting up 3) Acting up internally 4) Afflicted with the misery 5) Ailing 6) Arthritic 7) Billy Ray Cyrus title word 8) Bruised 9) Coming down with something 10) Down with the flu 11) Due for a massage 12) Feeling exercised 13) Feeling fluish 14) Feeling pain all over 15) Feeling sore 16) Feeling the flu 
having or causing an aching sensation: an achy back.