I have type 2 diabettes and taking metformin for several years.  I am presently suffering from right shoulder pain that sometimes the pain goes down through my hand.  I find difficulty in rotating my arms due to the pain in my shoulder.  Can this be the result of vitamin b 12 defficiency?
Hi, I read your problem. Actually frozen shoulder or adhesive capsule. It is common in diabetes, but cause is not known. It may be due to high glucose level. Frozen shoulder occurs when the shoulder joint capsules are Inflamed or stick with the head of humerus bone. The frozen shoulder causes pain and stiffness which leads to limitation of shoulder joint. Frozen shoulder has some causes like Diabetes, shoulder injury or stroke, heart disease, lung disease, Dupuytrens contracture. It does not seem to me that there is any it 12 deficiencies in this case because there is looking no symptoms of numbness or tingling on whole over arm. But pain can radiate to whole arm due to frozen shoulder or shoulder pain due to gravity or other reason. To rule out the cause of your shoulder pain get the x-ray of shoulder joint. Hope I have answered your query. Let me know if I can assist you further. 