Hmm... Self management I dunno in this case,
Part of what physiotherapists do is facilitate correct movement, this may be via positioning the scapula in the correct position, or stretching shortened muscles, and positioning weak ones in an optimum position for activation.
When it comes down to it people use a GP to manage any physical condition and they continue to see the GP until the problem has run its course. I feel the best course of action is personalized physiotherapy, hands on, .
Regards.