if the trigger point treatment only worked a little then it isn't the answer, right?

are we talking about real Wikipedia reference-linkfrozen shoulder or just someone who is really stiff? how long have they had the frozen shoulder? really, the research out there says you should mobilize and stretch the joint and surrounding tissue. maitland, kaltenborn, and others all offer really good mobilization techniques. true frozen shoulder often doesn't respond well to conservative treatment until it is at least 3 months old. then, treatment can slowly be made more aggressive. usually, full recover is expected unless the person is, for example, an uncontrolled diabetic. in fact, if they are a heavy smoker or drinker it may impact recovery too. and, if it is really chronic you have to consider that the AC, SC, and scapulothoracic areas may be involved. they may all need treatment. but, true Wikipedia reference-linkadhesive capsulitis just regardless needs lots of shoulder joint mobilization.