Table 1.

Classification overview of the International Classification of Orofacial Pain (ICOP) *.

Table	Subtype
1. Orofacial pain attributed to disorders of dentoalveolar and anatomically related structures	1.1 Dental pain 1.2 Oral mucosal, salivary gland, and jawbone pains
2. Myofascial orofacial pain	2.1 Primary myofascial orofacial pain 2.2 Secondary myofascial orofacial pain
3. Temporomandibular joint (TMJ) pain	3.1 Primary temporomandibular joint pain 3.2 Secondary temporomandibular joint pain
4. Orofacial pain attributed to lesion or disease of the cranial nerves	4.1Pain attributed to lesion or diseaseofthetrigeminalnerve 4.2 Pain attributed to lesion or disease of the glossopharyngeal nerve
5. Orofacial pains resembling presentations of primary headaches	5.1 Orofacial migraine 5.2 Tension-type orofacial pain 5.3 Trigeminal autonomic orofacial pain 5.4 Neurovascular orofacial pain
6. Idiopathic orofacial pain	6.1 Burning mouth syndrome (BMS) 6.2 Persistent idiopathic facial pain (PIFP) 6.3 Persistent idiopathic dentoalveolar pain 6.4 Constant unilateral facial pain with additional attacks (CUFPA)

* Cephalalgia, 40:129–221 (2020). Bold, subtype of pain focused on in this review.