Step 4: Read and complete the decision guide to learn more about your symptoms.
Based on your answers, some of the most likely causes of your shoulder pain are
rheumatoid arthritis or a related condition (especially if there is joint swelling)
a viral infection (as with the severe aches and pains during the flu).
Tendonitis, bursitis, or a muscle strain are possible, but would not explain pain in your other joints. Perhaps there is more than one of these conditions present at the same time.
Over-the-counter pain medicines, rest and ice may be helpful, but if symptoms persist, it is important that you see a physician to evaluate these symptoms.