Hi Genie. Frozen shoulders can be a bit tricky! There are several factors to consider. These factors are: trauma directly to the shoulder, trauma to the upper ribs, trauma to the upper thoracic and/or cervical spine, trauma to the cranium/cranial base, dental/facial trauma (either side), meningeal or umbilical trauma, visceral fascia trauma, hormonal issues related to menopause (may need to refer to naturopath). Take your time checking these areas, and use your objective tests to guide your treatments. Try not to get frustrated, as it may take some time and back and forth work between these areas and of course injuries to other parts of the body.
Let us know how you do, as this is a very common injury complex!