Anosmia causes

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

A temporary loss of smell can be caused by a stuffy nose or infection. In contrast, a permanent loss of smell may be caused by death of olfactory receptor neurons in the nose, or by brain injury in which there is damage to the olfactory nerve or damage to brain areas that process smell (see olfactory system). The lack of the sense of smell at birth, usually due to genetic factors, is referred as congenital anosmia. Anosmia may very occasionally be an early sign of degenerative brain diseases such as Parkinson's disease and Alzheimer's disease.


Causes

Common Causes


Causes by Organ System

Cardiovascular No underlying causes
Chemical / poisoning Acrylates, Cadmium Poisoning, Methacrylates
Dermatologic No underlying causes
Drug Side Effect No underlying causes
Ear Nose Throat Common cold, Nasal polyp, Samter's triad, Sinusitis, Stuffy nose,Swollen turbinate, Upper respiratory tract infection
Endocrine Cystic Fibrosis, Kallmann syndrome,
Environmental Nasal spray, Smoking, Zinc deficiency
Gastroenterologic Cystic Fibrosis
Genetic Anosmin-1 absence, Anosmin-1 damage, Bardet-Biedl syndrome, Cystic Fibrosis, Genetic factors, Intersexuality, KAL1 gene deletion, KAL1 gene mutation,Kallmann syndrome, Male pseudohermaphroditism,
Hematologic No underlying causes
Iatrogenic Permanent tracheostomy, Nasal spray
Infectious Disease Infection, Primary amoebic meningoencephalitis, Sinusitis, Upper respiratory tract infection
Musculoskeletal / Ortho Ethmoid bone injuries
Neurologic Alzheimer's disease, Brain injury, Degenerative brain diseases, Dementia with Lewy bodies, Esthesioneuroblastoma, Holoprosencephaly, Parkinson's disease, Primary amoebic meningoencephalitis
Nutritional / Metabolic No underlying causes
Obstetric/Gynecologic No underlying causes
Oncologic No underlying causes
Opthalmologic No underlying causes
Overdose / Toxicity Toxins, Zinc gluconate
Psychiatric No underlying causes
Pulmonary Samter's triad
Renal / Electrolyte No underlying causes
Rheum / Immune / Allergy Allergies, Samter's triad
Sexual No underlying causes
Trauma Ethmoid bone injuries, Head trauma, Trauma
Urologic No underlying causes
Dental No underlying causes
Miscellaneous Old age



Causes in Alphabetical Order

  • [[Upper respiratory

References

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