Left finger numbness, generally is the upper limb pressure resulting in impaired blood circulation, numbness, swelling, can be hot compresses, massage baking electricity and other physical therapy, will generally soon return to normal. Cervical spondylosis can also cause numbness in the fingers, due to cervical spine hyperplasia, physiological curvature straightening, can compress the nerve causing numbness symptoms, you can do traction, eat nerve-nourishing drugs, upper limb fractures damage the nerve, long-term diabetes can lead to peripheral neuropathy, can appear limb numbness, it is recommended to control blood sugar.