Impaired ability to smell. This may be caused by OLFACTORY NERVE DISEASES; PARANASAL SINUS DISEASES; viral RESPIRATORY TRACT INFECTIONS; CRANIOCEREBRAL TRAUMA; SMOKING; and other conditions.

Synonyms: Olfaction Disorder, Cacosmias, Paraosmias, Dysosmias, Smell Disorders, Olfaction Disorders, Impairment, Olfactory, Smell Dysfunction, Smell Disorder, Cacosmia, Paraosmia, Dysosmia, Dysfunction, Smell, Olfactory Impairment