1. A method of treating pain in a patient comprising administering a vanilloid receptor-1 (VR1) agonist to the patient, wherein the VR1 agonist is administered to a ganglion, wherein the pain in the patient is caused by a disease selected from the group consisting of post-herpetic neuralgia, trigeminal neuralgia, neuropathic pain, a chronic viral infection an inflammatory disease, and cancer; and wherein the ganglion is selected from the group consisting of a dorsal root ganglion, a trigeminal ganglion, and an autonomic ganglion; and the VR1 agonist is administered to the ganglion or a nerve root, and wherein the VR-1 agonist is administered to the ganglion at a volume of from 100 microliters to 500 microliters.