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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. TN is a form of neuropathic pain (pain associated with nerve injury or nerve lesion.) The typical or "classic" form of the disorder (called "Type 1" or TN1) causes extreme, sporadic, sudden burning or shock-like facial pain that lasts anywhere from a few seconds to as long as two minutes per episode.  These attacks can occur in quick succession, in volleys lasting as long as two hours.  The “atypical” form of the disorder (called "Type 2" or TN2), is characterized by constant aching, burning, stabbing pain of somewhat lower intensity than Type 1.  Both forms of pain may occur in the same person, sometimes at the same time. The intensity of pain can be physically and mentally incapacitating. 

The trigeminal nerve is one of 12 pairs of nerves that are attached to the brain. The nerve has three branches that conduct sensations from the upper, middle, and lower portions of the face, as well as the oral cavity, to the brain. The ophthalmic, or upper, branch supplies sensation to most of the scalp, forehead, and front of the head. The maxillary, or middle, branch stimulates the cheek, upper jaw, top lip, teeth and gums, and to the side of the nose. The mandibular, or lower, branch supplies nerves to the lower jaw, teeth and gums, and bottom lip. More than one nerve branch can be affected by the disorder. Rarely, both sides of the face may be affected at different times in an individual, or even more rarely at the same time (called bilateral TN)

The attacks often worsen over time, with fewer and shorter pain-free periods before they recur. The intense flashes of pain can be triggered by vibration or contact with the cheek such as when shaving, washing the face, or applying makeup, brushing teeth, eating, drinking, talking, or being exposed to the wind. TN occurs most often in people over age 50, but it can occur at any age, and is more common in women than in men. 

 

TN is known as the worst pain known to mankind and is often referred to as "the suicide disease" by Medical Science. 

It is estimated that 1 in 15,000 to 20,000 people world-wide have TN. The actual number may be higher as it is frequently misdiagnosed.