Dr Ravi Gopal Varma & Dr Nirmala speaks about Trigeminal Neuralgia . There are two separate trigeminal nerves one on each side of the face. These nerves are responsible for carrying the sensation of pain and other sensations from the face to the brain. Each nerve has three branches (forehand mid face and chin). Its possible to have TN of any (or all) branches. TN causes intense pain in part or all of the face.