Trigeminal neuralgia is a disorder that affects the trigeminal nerve, which runs from the jaw into the face. In trigeminal neuralgia, the nerve function is disrupted. This can cause attacks of mild or intense pain in the cheek, jaw, teeth, gums, lips or even the eye and forehead.
Bell's palsy is a condition where the nerve that controls the facial muscles becomes swollen or compressed, causing sudden facial paralysis or weakness on one side of the face and making it difficult to smile or close the eye on the affected side. Symptoms may include facial droop and difficulty with facial expressions, pain behind or in front of the ear on the affected side, sounds that seem louder on the affected side, headaches, loss of taste, and changes in the amount of tears and saliva the body produces.