bleujazz3
Fractal Fanatic
DR,I'd see a proper doctor - preferably an orthopedic surgeon specializing in upper limb - and get it diagnosed properly, most likely with an MRI - instead of asking an unqualified group on the Internet.
First, it could be a rotator cuff tear. It could be all sorts of other conditions that can affect a shoulder joint - an inherently unstable joint.
Second - whoever told you that a Covid booster caused a frozen shoulder has absolutely no idea what they're talking about. It may have given you a sore arm - the injection goes into the deltoid muscle which can get sore after the shot, but it doesn't go anywhere near the shoulder joint itself.
If you don't get a proper diagnosis and imaging, and it turns out to be something more than just an inflammatory "frozen shoulder", then you'll have way more trouble playing guitar for much longer than if you get it properly seen to now.
And yes, I am a medico - but I'm a Thoracic and Vascular Surgeon, NOT an orthopedic surgeon.
Thx; my post wasn't so much about asking for medical advice as it was commiserating. It's likely that the Voltaren (diclofenac) can help with the inflammatory pain. This was the same shoulder that experienced an anterior bicep tendon rupture back in 2007. The arm (near ball joint) humerus received a minor fracture and it took 7 weeks for the bone to heal. The orthopedist strongly suggested having rotator cuff surgery once the tendon ruptured 9 weeks after the original bone break...apparently some floating bone severed the tendon and voila...PopEye muscle! A year after the rupture, my workplace allowed me time away to undergo rotator cuff surgery, but that held for only 9 months following, then let go again.
My primary is currently using the "least invasive" approach currently which insurance will allow. My PT eval will be June 12th. Although it hurts when the arm is moved in extended directions (ceramic bowls to upper kitchen cabinets, putting socks on feet, etc.), the alternative could be far worse if the muscles weren't receiving some exercise/stretch.
My largest concern is that when undergoing PT for the left shoulder range of motion/strengthening home PT, it was very difficult keeping up with the exercise requirements. I guess I'll be occupied with PT for a while until the shoulder heals up, which could be 3/6/9 months...