<unk> , or microsmia, is a reduced ability to smell and to detect odors. A related condition is anosmia, in which no odors can be detected. Some of the causes of olfaction problems are allergies, nasal polyps, viral infections and head trauma. In 2012 an estimated 9.8 million people aged 40 and older in the United States had<unk>  and an additional 3.4 million had anosmia/severe<unk> .<unk>  might be a very early sign of Parkinson's disease.<unk>  is also an early and almost universal finding in Alzheimer's disease and dementia with Lewy bodies. Lifelong<unk>  could be caused by Kallmann syndrome or Autistic Spectrum Disorder. Along with other chemosensory disturbances,<unk>  can be a key indicator of COVID-19.
Hyposmia
Hyponatremia
Hyperaemia
Hypernatremia
Hypermethioninemia
Hypoglycemia
Hypervalinemia
Alkalosis