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.
The main symptom of trigeminal neuralgia is sudden attacks of severe sharp shooting facial pain that last from a few seconds to about two minutes. The pain is often described as excruciating, similar to an electric shock. The attacks can be so severe that you're unable to do anything during them. Trigeminal neuralgia usually affects one side of the face. In rare cases it can affect both sides, although not at the same time. The pain can be in the teeth, lower jaw, upper jaw, cheek and, less commonly, in the forehead or the eye.