?In 2011, just a few days before the release of the movie Bodyguard, Salman Khan had undergone surgery in the US. Khan was suffering from a neurological condition called trigeminal neuralgia, which was causing acute pain in his head, cheeks, and jaw, for several years, the actor had revealed later on. The disease originates from the trigeminal nerve, the largest of the cranial nerves, and plays a key role in sending pain, touch, and temperature sensations from the face to the brain. Trigeminal neuralgia is often described as one of the most severe types of pain experienced and is hence called the suicide disease. ?