Hello, Thanks for writing to us, I have studied your case with diligence. As per your history and symptoms there is possibility of frozen shoulder. For frozen shoulder physiotherapy and exercises are very important. You can take medication before doing exercises to avoid stretch pain. If stiffness increases then intra-articular injection shot can be taken. For severe cases we do manipulation of shoulder joint under anaesthesia. Another possibility of rotator cuff partial injury leading to persistent pain. Physiotherapist can help you to improve strength of muscles. Blood investigation are important for viral origin of symptoms. Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries. Wishing you good health. Take care.