You are currently viewing Olfaction Disorders – Mnemonic

Here is a quick mnemonic “DISORDERS OF OLFACTION to remember about Olfaction Disorders

This can be valuable for patients as well as medical doctors, nurses & students doing their clinical rounds. You can also find it very useful for med exams like USMLE, MBBS, NEET PG, FMGE, NExT, MCAT & NCLEX exams

Olfaction Disorders : How To Remember Easily ?

  • D – Decreased smell function is common in the elderly population.
  • I – Infections, such as respiratory infections, can cause permanent smell loss.
  • S – Shearing and scarring of the olfactory fila can result from head trauma.
  • O – Olfactory dysfunction is associated with certain neurodegenerative diseases.
  • R – Rhinosinusitis and polyposis can lead to significant smell loss.
  • D – Damage to the olfactory epithelium can occur due to respiratory infections.
  • E – Estimations show a prevalence of 13.5% of olfactory dysfunction in the general population.
  • R – Reproductive state and gender can influence olfactory function.
  • S – Smoking can affect the ability to smell.
  • O – Olfactory impairment can be an early sign of SARS-CoV-2 infection.
  • F – Food may lack flavor for the elderly with presbyosmia.
  • O – Olfactory impairment is seen in PD, AD, Huntington’s disease, and other neurodegenerative diseases.
  • L – Lesions within olfaction-related structures can cause smell loss in multiple sclerosis.
  • F – Frontotemporal dementia is accompanied by olfactory impairment.
  • A – Aging is a significant factor in olfactory dysfunction.
  • C – Chronic rhinosinusitis can result in smell loss.
  • T – Trauma, such as head trauma, can lead to long-lasting or permanent smell loss.
  • I – Influenza and pneumonia can cause direct damage to the olfactory epithelium.
  • O – Olfactory function can be improved with intranasal orexin A administration.
  • N – Narcolepsy and cataplexy can cause impaired olfactory performance.


Dr. Arin Nandi

Passionate About Medical Science & Helping Future Doctors Achieve Top Ranks In Medical Exams. He is professionally a dentist as well as a public health expert from JIPMER (1), (2)working in health department