Abstract
Neuralgia is defined here as chronic pain, without a known anatomic substrate; in the distribution of spinal or cranial nerves. Among the cranial neuralgias are tic douloureux, other trigeminal neuralgias, and occipital neuralgia. The spinal neuralgias include postherpetic neuralgia, postthoracotomy neuralgia, tabes dorsalis, and posttraumatic neuralgia.