The causes of trigeminal neuralgia of the ear: First, the factor of vascular compression and caused, at the beginning of the human body’s blood vessels are very soft, although it and the nerve have contact with each other, but the vascular pulsation will not seriously stimulate the nerve, but with the increasing age, the degree of vascular sclerosis continues to aggravate, in some special conditions of the vascular pulsation will stimulate the nerve, which is very easy to induce trigeminal neuralgia, in the clinical is one of the most common phenomenon. This is one of the most common clinical phenomena. Second, sometimes the formation of cerebral aneurysm, will also press the trigeminal nerve pain. Third, viral infection factors, especially for the erosion of the nerve virus, can easily cause abnormalities in the trigeminal nerve, inducing trigeminal nerve pain. Fourth, caused by tumor compression of trigeminal nerve, need to improve the examination to confirm the diagnosis.