osteoarthritis
"For anyone considering SYNVISC, I'd like to share that I've had both knees done twice & will continue to have the injections. Some background: I'm 59 yrs old, 5'6", approx 175lbs. The first time I had SYNVISC injects. (in both knees), it took about 5 weeks to experience the full benefits, but once it "kicked in," there was ZERO pain & complete fluid mobility! For almost a year, my knees felt "brand new!"  
I've recently had a second set of injections (both knees) and although there has been a bit more to pain in the recovery, each day there is definite improvement. 
I must caution anyone who gets these injections not to panic if there is noticable pain initially after the injections. Take it easy. It gets better!"