"Wikipedia reference-linkfrozen shoulder" is a term used to describe what is known as Wikipedia reference-linkadhesive capsulitis; in other words, the capsule that surrounds the joint gets stuck together and restricts movement. The muscles then tighten up around the joint to protect it. It sounds like the cortisone reduced your inflammation, taking away your ache. The actual problem hasn't been dealt with, which is likely why you're getting the cramp feelings again. You'll need plenty of hands-on therapy and exercises to mobilise the joint and encourage movement. progress can be pretty long and slow (lne study showed that 41% of patients still had symptoms at an average of 4.4 years), and can often seem to get worse before it gets better, but stick at it and results are good.