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Trigeminal neuralgia (TN), also called tic douloureux, is a chronic pain condition that affects the trigeminal or 5th cranial nerve, one of the most widely distributed nerves in the head.
Pain may involve any of these locations but usually involves the second or third divisions, either alone or in combination. Trigeminal neuralgia may involve the first division but usually in association with the second division. Pain in only the first division is often not trigeminal neuralgia. back to top What causes Trigeminal Neuralgia? The trigeminal nerve carries messages regarding sensation from the face to the brain. Patients with Trigeminal Neuralgia have a defect in the covering of the trigeminal nerve, which allows abnormal cross-talking between nerves that usually carry messages of normal non-painful sensation with nerves that carry painful messages.