Anosmia

**Definition:** Complete or severe loss of the subjective sense of smell. Loss of smell may be caused by many factors such as a cold, allergy, OLFACTORY NERVE DISEASES, viral RESPIRATORY TRACT INFECTIONS (e.g., COVID-19), aging and various neurological disorders (e.g., ALZHEIMER DISEASE).

**Tree numbers:** - C10.597.751.600.500 - C23.888.592.763.550.500

**Synonyms:** - Loss of Smell