Shoulder pain in people with diabetes is often due to stiffness of the joint, commonly called frozen shoulder, and the best management focuses on gradual improvement of movement and pain control; regular physiotherapy with guided stretching and strengthening exercises is the most important step, and you should do these exercises consistently at home as advised. Applying warm compresses, maintaining good posture, and using pain-relief medicines when needed can help, but controlling your blood sugar is equally important because high sugar levels can worsen stiffness and delay recovery. Avoid forcing movements or heavy lifting, and follow up with your doctor if pain is severe or not improving, as additional treatments like injections may sometimes be required.