You need to do rotator cuff excercises along with joint supplementation. If you want, icing on/off will bring down any inflammation (if you have any). My rotator cuff had been badly damaged for over a year and a half..stupidly at first, I tried training through the pain..didn't last and made issues worse. I even ran 600mg of deca months back, and it only masked the pain temporarily, but damage was still taking place, and it got so bad to the point where 900mg of deca couldn't even mask the pain..so, I dropped the deca and gave chest & shoulders a 2 month break, lost a bit of size, but it didnt bother me because both of them grow like weeds. When I came back from the break, they were not near fully healed, but I still had to train very lightly in the first month back, and warmed up for 15-20min with rotator cuff excercises every single time before working chest and shoulders. Coming back and doing these rotator excercises and light lateral raises sped up the healing process quicker, rather than taking another month or so off. Shoulder workouts were limited to light lateral raises (this is the only excercise you should do for a while if you are recovering from this injury, and and if you want to prevent further damage). As for chest, there was just one machine I was able to use with limited rom where I could get the pump with higher reps and experience no pain. Eventually, you will progress in healing, while gaining size and strength back slowly after being off for those 2 months. Key is to start out super light and you must stay at this comfortable weight and do not move up until you are ready. You must listen to your body and work what is comfortable, if any pain, then you either need to lower the weight or switch up/tweak the excercise. This healing process takes time, but the biggest thing that fixed me was what I mentioned above, coming back with very light weights (talking 5-10lb dumbells for laterall raises) and constantly warming up with rotator excercises each session for 15-20 minutes. Your rc's will strengthen more and heal, in turn able to handle more weight and eventually come back to normal--with time. This will not happen over night, or a within a week or a month. This is a lengthy recovery process which requires time, patience and going about it smart.
OP, this might not be your situation, but I threw this out there for anyone else dealing with rotator cuff or joint issues. Look into fish oils and other joint lubricating supplements, they are out there and not expensive.