Why Do My Hands Get Numb and Tingly When Holding a Book Above My Head?
1. Introduction Hand numbness and tingling when holding a book above your head are caused by the positional compression of the brachial plexus nerves or the subclavian artery as they pass through the narrow anatomical spaces of the shoulder and neck. Raising the arms overhead creates a biomechanical bottleneck in the upper chest, pinching the … Read more