Both “trigeminal neuralgia” and “intermediate neuralgia” are facially manifested as severe facial pain, and because the clinical symptoms of these two diseases are similar, it is difficult for professional doctors to distinguish them and misdiagnosis and mistreatment often occurs. The difference in the prevalence of trigeminal neuralgia is more common in middle-aged and elderly people over 40 years old, with women being the majority. Intermediate neuralgia is also more common in middle-aged or elderly people, but is more common in men. Trigeminal neuralgia has a sudden onset and is characterized by severe pain in the distribution area of the trigeminal nerve, in the form of pins and needles, electric shocks, cuts or tears, with a short duration, usually ranging from a few seconds to 1 to 2 minutes. The pain usually occurs on the right side of the face and does not extend beyond the midline of the face and the trigeminal nerve distribution area. Intermediate neuralgia is usually a one-sided facial pain that occurs more than an hour after going to bed at night and lasts from half an hour to a few hours, and can be accompanied by tearing and nasal mucosal congestion on the painful side. Intermediate neuralgia can be divided into two types: one is the “ear type”, which is mainly otalgia, often starting in the ear or in front of the ear, with intermittent, paroxysmal or continuous severe pain, and can radiate to the same side of the face, the lateral tongue and the pharynx. The other type is “ill-defined facial pain”, which lasts for several hours per episode. Trigeminal neuralgia attacks are accompanied by frowning and clenching of teeth, opening the mouth to cover the eyes, and the patient often rubs the face with the palm of the hand or a towel to relieve the discomfort. When the lesion is severe, painful spasms appear on the affected side, and the corners of the mouth are pulled to the side, accompanied by facial redness, conjunctival congestion, lacrimation and salivation. Intermediate neuralgia attacks are often accompanied by ipsilateral nasal mucosa congestion and lacrimation, and sometimes taste and hearing changes may occur.