Finger numbness can be a result of carpal tunnel syndrome, B12 deficiency or an autoimmune disease. If you notice this symptom, you should consult your doctor, especially if you additionally experience tingling, swelling, dizziness or weakness. Learn more about what causes numbness in the fingers and how to treat it. Tingling In Fingers, Numbness In Fingers, Finger Numbness, Tingling Hands, Autoimmune Disease Symptoms, Numbness In Hands, Finger Hands, B12 Deficiency, Carpal Tunnel