Words are inadequate

IF i'm picturing things right, it sounds like your lower traps, rhomboids and pecs(upper chest) are likely the culprits. They all have to work together. Rhomboids and pecs are antagonistic muscles, one becomes elongated, the other side will become contracted. Long term, this presents a problem. Hmmm, also possibly lattisimus dorsi, large back muscle, also helps you reach. These all work together.

I came in thinking it was a rotator cuff problem. Phy Ther have the equ of a Masters degree, unless they are working under someone else and have a lesser degree (maybe a 4yr), but they still have a buttload more schooling than CMT's do; it's why i can't just go get a job helping out without going back to school.

So it pains me to hear that you went to PT, told them where the problem was, and came out with a problem remaining. I could be missing something...so i'll be generous. They should have taken your complaint and then muscle tested everything related and worked ir out until it was fixed or you had sufficient exercises to do at home. /rant.

Instead of me trying to describe stretches here, i am going to see if i can find them shown on you tube and send them.

Ice is your friend, apply it where it hurts. You may also want to try contrast treatment, contrasting between moist heat and ice. Ice until comfortably numb, rest for a few minutes, then apply moist heat (hot shower, hot moist towels, let me know if need more ideas).

There is a great product you can get from chiros, maybe your PT, massage places, and Amazon, called Biofreeze. It simulates the ice pack therapy with a combination of menthol and holly extract and the scent goes away. Does not even compare to over the counter products. Little bit goes a long way.

Homedics also makes a nice vibrating massage tool that i have found helpful. Sold at Target, long handle, large square head. Stef uses it to help me, and my chiro has something like it but stronger. Vibration confuses the muscle into relaxing without the pounding.

Let me know if this is helpful or over the edge, and i will adjust appropriately.