I had problems and it was from Levaquin (Tequin) an antibiotic. You might want to review any meds like that you have taken recently. I'm stuck with the tendonitis now, but at least they didn't rupture. Voltaren gel (a muscle relaxer gel) has been helpful as is bengay, heat or ice depending on how I feel. Also, lidocaine patches can help, yuo can cut them to fit. I only wear them at night because they roll up under my clothes. The volteran gel is really a nice new thing and it also loosens my always tight arm muscles. My rheumie prescribed it. Physical therapy can really help if they do proper stretching exercises and other therapies.
Mine is "roaming" and comes and goes out of the blue,but seems to occur every other month or so, switching shoulders ach time. Mine was confirmed by EMG, deep muscle/tendon/nerve stimulation---it was extremely painful and long.
Hope you feel better. Tiger balm can help if you like that kind of thing. The voltaren helps me most. I'm allergic to the pills, but can use the gel. My liver just doesn't like the pills.
Ills--Sjogrens-Lupus cond., AI polygland. dysfunction 2, hyper/hypopigment, scoliosis,kyphosis,stenosis, deg.,O.A.,spine surgeries, salivary/lymphectomies, NASH, COPD, RLS, UT/GI bleeds, hystero, brain/nerve damage,TB
Meds--INH,Plaquenil, Evoxac, Metformin, Synthroid, HCTZ, HRT and Lidocaine patchs, Voltaren gel, Klonopin, Vicodin, Restasis, Albuterol, steroids