I highly recommend a CBD dominant topical salve or a THCA salve applied to all the muscles in the scapula, under the armpit and down the cervical and upper thoracic spine for muscle spasm pain relief in about 10 minutes. The first time you use the salve you may need to apply a second layer after about 10 minutes for longer lasting pain relief.
You may want to find someone who is experienced in a Spencer examination and manipulation of the frozen shoulder.
drolson