Have left upper arm/shoulder tightness seems worse when put snug fit shirt against it doc said stress muscle relaxer & ibuprofen. what can i do for it?

Stick em up: Range of motion for tight shoulder will,help. Agree with muscle relaxants and anti inflammatories , but if you take ibuprofen, take 600 mg 3-4 x daily if your body can tolerate that safely. Clasp hands and lift completely overhead several times a day. Pinch your shoulder blades together, put hand back,to,touch opposite shoulder blades. Stretch daily. If that dos. It resolve it, see a PMR or ortho.