What causes pain in the left shoulder?
Disease description:
When carrying a backpack, I feel pain in my left shoulder. I never had this symptom before. What could be causing the pain in my left shoulder?
Doctor's answer (1)
Dr. Lin Yunfei
This symptom generally occurs due to cold exposure or certain illnesses. It may also be caused by some less common conditions, such as coronary heart disease or acute myocardial infarction, which could potentially lead to shoulder pain. Additionally, certain lung diseases—for example, cancer in the upper part of the lung—might invade nerves, and when the brachial plexus is affected, it can result in shoulder pain.
