| Idiopathic | Metabolic |
- Bell's palsy
- Melkersson-Rosenthal syndrome (recurrent alternating facial palsy, furrowed tongue, faciolabial edema)
| - Diabetes mellitus
- Hyperthyroidism
- Pregnancy
- Hypertension
- Vitamin A deficiency
|
| Congenital | Neoplastic |
- Traumatic
- Myotonic dystrophy
- Moebius syndrome
- Hereditary congenital facial paresis 1
- Hereditary congenital facial paresis 2
- Hereditary hypertrophic neuropathy
- Hemifacial microsomia (Goldenhar syndrome)
- Poland syndrome
- Teratogenesis
- Osteopetrosis
- Sclerosing bone dysplasias
- Trisomy 13, trisomy 18
- Branchio-oto-renal syndrome
| - Benign lesions of parotid
- Cholesteatoma
- Seventh nerve tumor
- Glomus jugulare tumor
- Leukemia
- Meningioma
- Hemangioblastoma
- Sarcoma
- Carcinoma (invading or metastatic)
- Hemangioma of tympanum
- Hydradenoma (external canal)
- Schwannoma
- Teratoma
- Langerhans cell histiocytosis
- Fibrous dysplasia
- Neurofibromatosis
|
| Trauma |
- Basal skull fracture
- Penetrating injury to middle ear
- Lightning
- Barotrauma
|
| Neurologic | Vascular |
- Opercular syndrome (cortical lesion in facial motor area)
- Millard-Gubler syndrome
- Amyloid neuropathy
| - Anomalous sigmoid sinus
- Carotid artery aneurysm
|
| Infection | Toxic |
- External otitis
- Otitis media
- Mastoiditis
- Chickenpox
- Diphtheria
- Herpes zoster cephalicus (Ramsay Hunt syndrome)
- Encephalitis
- Poliomyelitis (type 1)
- Mumps
- Mononucleosis
- Leprosy
- Influenza
- Coxsackievirus
- Malaria
- Syphilis
- Tetanus
- Tuberculosis
- Botulism
- Acute hemorrhagic conjunctivitis (enterovirus 70)
- Gnathostomiasis
- Mucormycosis
- Lyme disease
- Cat scratch
- HIV
| - Thalidomide
- Ethylene glycol
- Alcoholism
- Arsenic intoxication
- Carbon monoxide
|
| Iatrogenic |
- Mandibular block anesthesia
- Anti-tetanus serum
- Vaccine treatment for rabies
- Postimmunization
- Parotid surgery
- Mastoid surgery
- Post-tonsillectomy and adenoidectomy
- Iontophoresis (local anesthesia)
- Embolization
- Dental
|
| Autoimmune syndrome |
- Temporal arteritis
- Thrombotic thrombocytopenic purpura
- Periarteritis nodosa
- Guillain-Barré syndrome
- Multiple sclerosis
- Myasthenia gravis
- Sarcoidosis
|
