1. Nerve Damage
Your nervous system links your brain to the world. Your nerves report sensations, make your heart beat, and allow you to move. Most pain comes from damaged motor or sensory nerves. Nerve pain can indicate an autoimmune disease like multiple sclerosis, diabetes, drug use or reaction to medication, nutritional deficiencies like B6 and B12, motor neuron diseases like ALS, cancer, trauma and infectious diseases.