Thanks for all these additional details.
I am sorry to hear about your problems.
Well, Rotator cuff injuries could be acute or degenerative. As in past, you had pulled rotator cuff, so it could be related with degeneration,inflammation, or trauma of Rotator cuff.
Usually Nonsurgical treatments could improve symptoms for your condition.
Sometimes, it can start all of a sudden, without history of injury.
You can go for warm fomentation over affected shoulder with help of warm water bag.It will help in relieving the pain.
You should take adequate rest and avoid stress and avoid doing any heavy exercise. You should consult your doctor and discuss about physical therapy.
Physical therapy includes various modalities like - Short wave diathermy, Infra red,Wax therapy , these would help you.
You may also need corticosteroid pills, these would be very helpful.
Considering severity of pain, Best bet is to get examined from doctor ASAP. If possible, please get it managed in ER. Their doctor can give of injections to resolve inflammation and pain.
Please get it checked immediately.
Hope this helped
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