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.
Multiple sclerosis (MS) is an autoimmune disease where the body's immune system attacks the body’s myelin, the protective sheath that encases the nerves in the brain and spinal cord, eventually causing deterioration of the nerves themselves. When myelin is damaged, the messages that travel along that nerve may be slowed or blocked, interfering with the communication between the brain and the rest of the body.
Shingles (herpes zoster) is a viral infection that causes a painful skin rash with fluid-filled blisters. The rash is usually limited to one side of the body, occuring along the spine and running towards the chest and abdomen, but it can also appear on the head or on the arms and legs on one side. Normally the blisters disappear within a couple of days to weeks, but the pain remains. Shingles causes symptoms of pain, burning, numbness,tingling, and itching. It may also be accompanied by fever and chills, general achiness, headaches, and fatigue.