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Table 1 Eight practical classifications of headache occurring at cranio-maxillofacial area

From: Application of botulinum toxin in maxillofacial field: Part II. Wrinkle, intraoral ulcer, and cranio-maxillofacial pain

Differential diagnosis groups Cause of pain
Extracranial disorder Dental and craniofacial organ
Intracranial disorder Structures associated with the brain
Muscular disorder Muscle, tendon, connective tissue
Joint disorder Bone, ligament, joint
Neuralgic disorder Peripheral nervous system
Causalgia disorder Autonomous nervous system
Vascular disorder Vascular system
Psychiatric disorder Mental disorder