I don't know what causes it but when I was younger I used to snap, crackle and pop all the time. Now I just wish I would again as it always was like relief to the pressure in the joint. I don't think its really anything to be concerned about.
Been living with Crohn's Disease for 32 years. Currently on Asacol, Prilosec 60 mg, Estrace, Prinivil, Diltiazem, Percoset prn for pain and Calcium. Resections in 2002 and 2005. Recently diagnosed with Fibromyalgia and doing tests to see if I have Inflammatory Arthritis or AS.