Frequent shrugging of the shoulders may be caused by the following situations: First, it may be a problem of personal habits. Second, it may be the brain nerve cells or tumors and other lesions oppression of brain tissue, brain cells abnormal discharge, resulting in shoulder and neck muscles involuntary twitching, the formation of frequent shrugging symptoms. Thirdly, it may be caused by muscle strain in the neck or cervical spondylosis. Muscle strain in the neck leads to shoulder discomfort, and often requires shrugging to relieve muscle spasm and discomfort, thus leading to this symptom. If it is cervical spondylosis, it is possible to compress the nerve root of the shoulder and stimulate the shoulder muscles to develop neurological sensory abnormalities, which can also cause this symptom.