Numbness from the shoulder to the finger may be caused by the following two reasons: 1, the most common is caused by cervical radiculopathy, when the cervical spondylosis, the protruding cervical discs or hyperplastic bone will stimulate the nerve roots. The nerve roots are an important part of the brachial plexus nerve in the upper extremities, and stimulation of the nerve roots can cause symptoms of injury to the brachial plexus nerve, resulting in symptoms of numbness from the shoulder to the fingers. 2. Numbness from the shoulder to the fingers can also be caused by injury to one of the nerves in the brachial plexus nerve, whether it is the radial nerve, ulnar nerve, or median nerve injury, which can lead to symptoms of numbness from the shoulder to the fingers.