Stiff joints. Sometimes painful, sometimes not.

I was just wondering if anyone else has this problem.  Sometimes my finger joints, knees, wrists, and ankles get so stiff that I cannot move them unless I pop them.  Sometimes they hurt extremely bad until I pop them, sometimes no pain, and sometimes they just won't pop.  This is something that I have been dealing with for as long as I can remember, so it isn't something that has been caused by the sitting from doing MT or anything like that.  I have had one doctor to tell me that becuase there isn't pain all the time that the issue is benign.  I have also had another doctor to tell me that it may be a sign of arthritis because of the stiffness that I experience and actually not being able to move the body part until the joint pops.  He recommended that I start taking glucosamine chondroitin, keep an eye on the pain, and if it gets worse I should have it thoroughly evaluated.