A rhombus is a quadrilateral with all 4 sides being the same length. For example, look at the chopped-off pyramid on the back of a U.S. one dollar bill. The front face you see under the eye is a trapezoid, since it has 4 sides, and the top parallel with the bottom. A square is one example of a rhombus, but you can have a rhombus that isn't a square.
Causes of Trigeminal Neuralgia. In many cases, the cause of TN is never found. According to the National Institute of Neurological Disorders and Stroke, although anyone can get TN, itâs more common among women than men. Itâs also more common in people over the age of 50, although it can occur at any age.
Trigeminal neuralgia is sudden, severe facial pain. It's often described as a sharp shooting pain or like having an electric shock in the jaw, teeth or gums. It usually occurs in short, unpredictable attacks that can last from a few seconds to about two minutes. The attacks stop as suddenly as they start.