I had this problem there is a permanent swelling in my shoulder and also in regular intervals I have to rotate my head because then it doesn't feel good I have to adjust something I don't know what it is but I have to do it . Each time I rotate my head there is sound similar to knuckle..And after some time it irrates me.I went to physiotherapist but It doesn't helped me.i don't know what this problem is called. I too visited orthopaedic and they say it has become your habit I know this is not my habit. Please help