Nerve pain can be a symptom of many different conditions, and is caused when the brain receives a pain signal where there is no immediate cause. Symptoms include burning, tingling, numbness and loss of reflexes. Usually, nerve pain results from damage from a physical injury or diseases like cancer, diabetes or HIV. Often, treatment of the latter conditions causes the nerve pain. Diagnosis is made in some cases by CT scans, MRIs and skin biopsies. Treatment will vary from over-the-counter topical treatments to anticonvulsants and antidepressants to painkillers to electrical stimulation. Follow the links below to find WebMD's comprehensive coverage about nerve pain, its causes, how it is diagnosed, treated, and much more.