 [ Symptoms ] dull ache in flank area on both sides for several months seems worse when laying down also have cloudy smelly urine m 27 years old generally healthy in good shape i am just getting over the flu but have had some dull pain in my flank prior to getting sick i dont have any other symptoms such as frequentpainful urination no fever or nausea etc [ Disease ] hi if anyone woke like that the first place they should be is at the doctors if not your doctor get to an er asap good luck