The feeling of electricity in the left shoulder may be caused by cervical spondylosis, localized neuritis and other diseases, which should be paid attention to and timely consultation. 1. Cervical spondylosis: it is a disease based on degenerative pathological changes of the cervical spine, including cervical disc prolapse, cervical osteoarthritis, hyperplastic cervical spondylitis, cervical radiculopathy, etc. If the nerve is compressed, it may cause a feeling of over-electricity in the left shoulder. If the nerve is compressed, it can cause a feeling of electricity in the left shoulder, accompanied by neck and shoulder pain, neck stiffness, numbness of the upper limbs, restricted movement and other symptoms. 2. Localized neuritis: If the localized nerve of the left shoulder joint is inflamed, it can also cause peripheral electric sensation in the left shoulder, which is often accompanied by supraspinatus and infraspinatus muscle weakness, scapular joint pain and other symptoms. There are many other causes of the feeling of electricity in the left shoulder, which should be emphasized, timely consultation, identify the cause of the disease, and follow the doctor’s instructions for further treatment or therapy.