This may be caused by damaged nerves anywhere in the nervous system. Common causes include diabetes, shingles, never damage post surgery, chemotherapy and some vitamin deficiencies. It is frequently seen in patients with spinal problems related to disc prolapsed. Typically, the pain is sharp, spontaneous, lancinating and associated with numbness or altered sensations. It often has a burning quality and is particularly tender. Neuropathic pain can be difficult to treat as it tends to be unresponsive to painkillers and generally has to be treated using special drugs and techniques to calm the nervous system.