| Cardiovascular
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Aneurysm of the cavernous sinus, Angina, Basilar artery aneurysm, Carotidynia, Cerebellar infarction, Cerebral aneurysm, Cerebral arteriosclerosis, Cerebral hemorrhage, Cerebral palsy, Innominate artery disease, Internal carotid artery aneurysm, Intracranial dolichoectasias, Ischemia of posterior inferior cerebellar artery, Lateral medullary infarction, Posterior circulation cerebrovascular syndromes, Posterior communicating artery aneurysm, Posterior fossa angioma, Referred cardiac pain, Styloid–carotid artery syndrome, Subclavian steal syndrome, Superior vena cava syndrome, Takayasu's disease, Temporal arteritis, Tolosa-Hunt syndrome, Vascular compression, Wallenberg syndrome, Wegener granulomatosis
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| Chemical/Poisoning
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Aconitum poisoining, Arsenic poisoning, Chemical peel
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| Dental
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Dental abscess, Dental caries, Dental manipulation, Dental pain, Dental sepsis, Tooth infection, Wisdom teeth
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| Dermatologic
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Cellulitis, Erysipelas, Keloid, Neurofibromatosis, Parry-Romberg syndrome
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| Drug Side Effect
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Aztreonam, Bufotenin, Carbamazepine, Caspofungin, Cinoxacin, Clarithromycin, Clavulanate, Clonazepam, Diazepam, Diclofenac, Docetaxel, Haloperidol, Imipenem and cilastatin, Metronidazole, Miconazole, Monosodium glutamate, Nafcillin, Nilutamide, Orphenadrine, Oxacillin, Paclitaxel, Penicillin G, Phenytoin, Piperacillin, Spironolactone, Ticarcillin, Vardenafil, Verapamil
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| Ear Nose Throat
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Adenoiditis, Aerosinusitis, Allergic sialadenitis, Ameloblastoma, Atrophic rhinitis, Cholesteatoma, Cochlear implant, Cooperman-Miura syndrome, Dacryocystitis, Empty nose syndrome, Epithelial-myoepithelial carcinoma, Fungal rhinosinusitis, Ludwig's angina, Malignant tongue disease, Mandibular cyst, Mandibular osteitis, Maxillary cyst, Maxillary osteitis, Maxillary sinus carcinoma, Maxillofacial surgery, Mouth infections, Mouth ulcers, Nasal cavity cancer, Nasal congestion, Nasal foreign body, Nasal irrigation, Nasal tumor, Nasopharyngeal carcinoma, Nasopharynx tumor, Oral surgery, Otalgia, Otitis externa, Otitis media, Otospondylomegaepiphyseal dysplasia, Paranasal sinus cancer, Parotid abscess, Parotid duct obstruction, Parotid tumor, Parotitis, Rhinitis, Salivary gland cancer, Sialitis, Sialolithiasis, Sinus cancer, Sinus infection, Sinus trauma, Sinus tumor, Sinusitis, Sphenoid sinusitis, Sphenopalatine neuralgia, Upper respiratory tract infection
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| Endocrine
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Cystic fibrosis, Diabetic neuropathy, Hormone replacement therapy, Polycystic ovary syndrome
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| Environmental
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Heat burn, Cold injury
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| Gastroenterologic
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No underlying causes
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| Genetic
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22q13 deletion syndrome, Cystic fibrosis, Dentatorubral-pallidoluysian atrophy, Ehlers-Danlos syndrome, Hurler syndrome, Mucopolysaccharidosis, Neurofibromatosis, Otospondylomegaepiphyseal dysplasia, Paget's disease of bone, Paroxysmal extreme pain disorder, Polycystic ovary syndrome, Smith-Magenis syndrome, Stickler syndrome
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| Hematologic
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No underlying causes
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| Iatrogenic
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Cochlear implant, Dental manipulation, Eye surgery, Hormone replacement therapy, Maxillofacial surgery, Oral surgery, Plastic surgery
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| Infectious Disease
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Abscess, Adenoiditis, Bell's palsy, Botulinum toxin, Cellulitis, Clostridium botulinum, Dental abscess, Dental sepsis, Erysipelas, Fungal rhinosinusitis, Guillain-Barre syndrome, Hantavirus pulmonary syndrome, Herpes simplex virus, Herpes zoster, Herpetic keratitis, Lassa fever, Ludwig's angina, Meningitis, Mouth infections, Mucormycosis, Mumps, Opisthorchis, Orbital cellulitis, Otitis externa, Otitis media, Paget's disease of bone, Parotid abscess, Phlegmon, Poliomyelitis, Post-herpetic neuralgia, Postherpetic neuralgia, Ramsay-Hunt syndrome, Rhinocerebral mucormycosis, Rhinocerebral phycomycosis, Rhinocerebral zygomycosis, Rhizopus, Shingles, Sinus infection, Tabes dorsalis, Tooth infection, Upper respiratory tract infection, Varicella-zoster virus, Zygomycosis
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| Musculoskeletal/Orthopedic
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Arthritis of the temporomandibular joint, Articular disc displacement, Cervical spine dysfunction, Cervical traction, Costen syndrome, Craniosynostosis, Degenerative joint disease, Dislocation of jaw joint, Eagle's syndrome, Elongated styloid process, Facial fracture, Increased cervical and lumbar lordosis, Increased cervical and lumbar scoliosis, Internal joint derangements, Jaw clenching, Jaw malocclusion, Mandibular osteitis, Mastoidectomy, Mastoiditis, Maxillary osteitis, Muscle spasm, Myofascial pain syndrome, Osteonecrosis of the jaw, Otospondylomegaepiphyseal dysplasia, Paget's disease of bone, Temporomandibular joint dysfunction, Temporomandibular joint laxity, Tolosa-Hunt syndrome, Torticollis, Trauma of the temporomandibular joint, Upper cervical spondylosis
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| Neurologic
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Acoustic neuroma, Bell's palsy, Brainstem glioma, Cerebellar infarction, Cerebral aneurysm, Cerebral arteriosclerosis, Cerebral hemorrhage, Cerebral palsy, Chronic paroxysmal hemicrania, Cluster headache, Cluster-tic syndrome, Congenital fourth nerve palsy, Cranial neuralgia, Dentatorubral-pallidoluysian atrophy, Diabetic neuropathy, Epidural hematoma, Esthesioneuroblastoma, Facial nerve tumors, Geniculate neuralgia, Glossopharyngeal neuralgia, Guillain-Barre syndrome, Hyperacusis, Infraorbital nerve dehiscence, Lateral medullary infarction, Meningioma in the posterior fossa, Meningitis, Migraine, Migrainous neuralgia, Multiple sclerosis, Muscle contraction headaches, Nervus intermedius neuralgia, Neuralgia of the superior laryngeal nerve, Neurofibromatosis, Neurologic pain, Neuroma, Occipital neuralgia, Ophthalmoplegic migraine, Pachygyria, Parkinson's disease, Parry-Romberg syndrome, Periodic migrainous neuralgia, Peripheral neuropathy, Pinched nerve in the neck, Poliomyelitis, Post-herpetic neuralgia, Posterior cervical sympathetic syndrome, Posterior circulation cerebrovascular syndromes, Postherpetic neuralgia, Posttraumatic neuralgia, Primary headache, Raeder paratrigeminal syndrome, Ramsay-Hunt syndrome, Referred cardiac pain, Referred facial pain, Referred otalgia, Rostral brainstem ischemia, Sphenopalatine neuralgia, SUNA headache, SUNCT headache, Superior laryngeal neuralgia, Superior orbital fissure syndrome, Tabes dorsalis, Thalamic syndrome, Tic douloureux, Trigeminal causalgia, Trigeminal neuralgia, Wallenberg syndrome
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| Nutritional/Metabolic
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No underlying causes
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| Obstetric/Gynecologic
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No underlying causes
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| Oncologic
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Acoustic neuroma, Ameloblastoma, Benign astrocytoma, Brainstem glioma, Epithelial-myoepithelial carcinoma, Esthesioneuroblastoma, Facial nerve tumors, Malignant teratocarcinosarcoma, Malignant tongue disease, Maxillary sinus carcinoma, Meningioma in the posterior fossa, Mucoepidermoid carcinoma, Nasal cavity cancer, Nasal tumor, Nasopharyngeal carcinoma, Nasopharynx tumor, Neuroma, Orbital tumor, Pancoast tumor, Paranasal sinus cancer, Parotid tumor, Salivary gland cancer, Sinus cancer
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| Ophthalmologic
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Acute glaucoma, Acute iritis, Conjunctivitis, Eye injury, Eye surgery, Glaucoma, Herpetic keratitis, Iridocyclitis, Iritis, Keratoconjunctivitis sicca, Narrow-angle glaucoma, Oculogyric crisis, Ophthalmoplegic migraine, Orbital cellulitis, Orbital tumor, Retro-orbital disease, Rollet syndrome, Uveitic glaucoma
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| Overdose/Toxicity
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No underlying causes
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| Psychiatric
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Anxiety, Depression, Hysteria, Psychogenic pain, Somatization disorder
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| Pulmonary
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Cystic fibrosis, Hantavirus pulmonary syndrome, Wegener granulomatosis
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| Renal/Electrolyte
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Wegener granulomatosis
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| Rheumatology/Immunology/Allergy
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Allergic sialadenitis, Arthritis of the temporomandibular joint, Guillain-Barre syndrome, Parry-Romberg syndrome, Sjogren's syndrome, Takayasu's disease, Temporal arteritis, Wegener granulomatosis
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| Sexual
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No underlying causes
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| Trauma
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Eye injury, Facial fracture, Facial injury, Head injury, Injury, Sinus trauma, Superior orbital fissure syndrome, Trauma of the temporomandibular joint, Whiplash injuries
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| Urologic
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No underlying causes
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| Miscellaneous
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Cold injury, Dental caries, Excess chewing, Excess shouting, Excess talking, Heat burn, Hyperacusis, Insect bite, Muscle spasm, Nasal foreign body, Nasal irrigation, Nocturnal bruxism, Poor positioning of the head, Postoperative pain, Sleep apnea, Stress, SUNA headache, Torticollis, Unconscious jaw clenching, Vascular compression
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