Trigeminal neuralgia can be classified into typical and atypical subtypes based on clinical manifestations. The two types differ greatly in pain characteristics, triggers and neurological functions, and serve as an important basis for distinguishing primary trigeminal neuralgia from secondary trigeminal neuralgia.

I. Typical Trigeminal Neuralgia

Typical trigeminal neuralgia is characterized by the following features:Location of pain: Pain is usually confined to one side of the face, specifically the distribution area of the trigeminal nerve, including the forehead, eye sockets, nostrils, mouth corners and other regions.Nature of pain: Sudden, brief, sharp electric-shock or stabbing pain.Triggers: Typical trigeminal neuralgia has identifiable triggers. Pain may be induced by touching specific facial areas such as the alae nasi and upper lip.Attack frequency: Pain attacks occur periodically and may recur over weeks or months.

II. Atypical Trigeminal Neuralgia

Symptoms of atypical trigeminal neuralgia are less distinct and overlap with those of other neurogenic headaches and disorders. Its main features are as follows:Vague symptoms: The pain tends to be milder, dull and persistent, instead of sudden electric-shock or stabbing pain.Unfixed pain area: Pain may not be restricted to the classic trigeminal nerve distribution on the face, and can spread more widely to the head, neck and other facial regions.No obvious triggers: There may be no specific stimuli to provoke pain episodes.Relevance to psychological factors: Symptoms can be aggravated by mood swings and stress.

In short: Typical pain presents as paroxysmal attacks with trigger points and intact nerve function; atypical pain manifests as persistent discomfort without trigger points accompanied by impaired nerve function.

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