Thank you for your detailed answer. You are right, it seems that the shoulder joint is the most complex of all joints we have.
I may go one day to a doc because of the pain I experience; however, I have discovered, the less I move the more painful and restricted my shoulder is. The more I move the better my shoulder feels... ???
Because I usually am very 'moveable' :-) ; I do workout almost every day and I walk my dog at least one hour daily - I don't know what a doc would do…
I read lots of information about the condition called "Frozen Shoulder" and see just few options:
• Taking anti-inflammatory drugs like Ibuprofen or Aspirin (especially good when the condition is caused by bursitis)
• Maybe some physiotherapy (this is more or less what I’m doing with my workout)
• Maybe some massages, or trigger point therapy (I can do it to some extent on my own)
• Doctor’s last cure is the surgery (this is what Venkatachari M said - see below - about “gap between the shoulder joint muscles and bones”). This works for some folks and is not working for others.
I almost forgot it, there is also an injection of steroids or cortisone (?) possible...
Thank you very much for the very valuable link with great exercises.
By the way, British NHS pages say that we have three stages of frozen shoulder: freezing phase, frozen phase, and thawing phase. After this - 3 years - your shoulder is like new. ????