YES, MY WIFE KEEPS GETTING VERY STRONG PAIN ON HER LEFT SIDE.  WE THOUGHT IT WQS HER KEDNIES AT FIRST BUT IT IS MORE ON THE LOWER SIDE.  IT A STRAINED MUSTLE.  ALSO, I HAVE BEEN DIAGNOSED WITH SPINAL STINOSISW,  CAN ANYTHING BE DONE ABOUT IT.  I HAD A BONE FUSSION IN 1970 WHICH IS TGE CASUE.
Hi...for your spinal stenosis consult a neurosurgeon... treatment depends on the degree of stenosis...for your wife...get an ultrasound done as it could be ureteric stone or some ovarian cyst...