People freak at the word 'steroid' ........ Depo Medrone is the usual injection offered, a bit like WD40 into the joints. Adds a little 'jelly' between the joints = easing of pain.
I've never considered that DM would cause hair loss, having held many a man's hand prior to them having the injection ;-) in the 1980s.
Why would shock wave therapy be any better than a proven injection which has been used for many years.
MayB hot/cold water therapy would help, a bowl of deep hot and one of cold water, putting the feet into each above the ankle bones: wriggle foot around. From hot into cold into hot ........
When did U have the MRI?