Oh, yeah, sorry-
This is going to sound so dumb, but increasing your water intake will help, potentially by increasing blood volume to help find a way to get serum or blood into the muscles/connective tissue with the issue underlying your pain helping to start resolving the issue. The extra, clean water will increase your blood pressure slightly and better push into all capillary beds and pharmacological compartments and irrigate them and wash out lactic acid, muscle breakdown products like myoglobin, and some of the other irritating candidates that may make this condition worse, clearing them renally. I don't know if this will help or not due to feeling bloated, but it will help with maintaining muscle conditioning as hydration is key to powerlifiting/bodybuilding/massage and physical therapy recovery.
Therapeutic massage, as mentioned, is also a great way to condition or manicure muscles or muscle groups and to spot issues with the tissue, but be careful and stay hydrated. Your sleep posture can also seriously mess with your neck or shoulder alignment, and possibly then the nerves coming out of the cervical vertebrae. I have a bad habit of sleeping on my side when on a too firm surface, or in a the wrong orientation, letting me wake up with a deadened hand or arm. It's just the body impinging on that nerve bundle, and immediate manipulation/kneading/stripping of the tissue is what tends to get things off the nerves and restore feeling.
Neck issues from chronic muscle tension (oh, occiputs, I hate y'all), even torticollis could also lead to wonky cervical alignment, from personal experience, and that may be affecting the exit of the nerves from the cervical vertebrae. Thus, it seems that any problem with the "intonation" of your trunk or pelvis and legs can cause problems by indirectly tugging on your skeletal system and causing strange configurations of the vertebrae that have neurological complications distal to the physiological issue. I have chronic back problems and pain that stems from an asymmetric pelvic girdle which jacks up the spine/neck and also my legs. Fortunately, I think a visit to a D.O., not an M.D., would be a great place to start, as I am no medical professional...not even on daytime TV.
But, since the nerves from the cervical vertebrae run through the shoulder area, this painful foci could be initiated by a local or distal cause, a visit to a profession would help most. IF I am being an accurate shadetree enthusiast, a good massage therapist, an active release therapist/physical therapist, or a D.O. might help you find the cause (the latter especially) and remove it (the former especially) and give you an actual professional diagnosis and advice on how to resolve this problem and get this muscular/skeletal issue to abate.
Again, I hope you can find some respite as you chase down candidates for this inconvenience. Mr. Brannon's suggestion of cbd oil, like the *pure* stuff, is an awesome suggestion bringing great pain abatement and calmness and few to no psychological effects, depending on the product's purity. Products isolated by supercritical carbon dioxide solated from C. indica have more cbd molecules than similar isolates from hemp...but then again, there is my middle of the night feline assault/nightmare experience. I still think cbds are a great suggestion from Mr. Brannon. Godspeed, Greg.
Cheers,
John