I had to deal with 3 partial tears in my shoulders for over a decade. Doctors did fuck all. PT made it much worse. In fact when I started PT back then, I only had one bad shoulder, and when I left 3 months later, they fucked my other shoulder and didnt fix anything with the original.
Finally, 13-14 years later, kids are growing and I just got fed up and said fuck it, im hitting it head on on my own. Somehow that worked. 2 tears are now 95% functional. I went from not being able to bench press the bar, to working with 275 again. Still no where near where i was but its a major improvement and more important, most of the pain is gone.
What I did was listen to the body builders. They suggested BCP/TB + HGH and I did that. That helped a lot with after workout inflammation. What used to hurt for 4-5 days now hurt maybe 1-2 minus a few very painful dead shoulder experiences in between. But in general, it meant I could work out more. I hammered the damage where it hurt the most (bench and shoulder pushes). I didnt dick around like the PT people wanted by strengthening around it. I did the most painful exercise with as much weight as I could stand. It was ugly...
Obviously I dont recommend doing it the way I did.
I honesly thought I was going to tear them fully and get surgery. Imho, that would still be better than what I had before. Instead I was very surprised by by how my body adjusted. It took less than 3 months to go from bar back to 135lb on bench. It still hurt like hell, but I was doing it. Then it took about 9 months to start working with 225 again. I was stuck there for a long while then one day I was just able to do more and I went up to 275 quickly. Im stuck here right now. No rush. Im old.
I do have one other partial tear to take care. The ones I fixed were on the upper shoulder around delts. I have another near bicep connection that makes shoulder press very hard. Working on that now. So far... it caused bad inflammation when I do a pure shoulder day. But im off gear right now so I suspect (and hope) that once im in a cycle again, that will ebate a bit.
Thats my experience with shoulder and chest issues. When I started it was just BPC/TB/GHK-Cu and HGH. At some point I did my 1st Test-C newbie cycle. Then a break and then I did 2nd cycle with Test/DECA/Tren/Primo. Now in down time again.