Top 5 Warning Causes of Olfactory Hallucinations

By Shubhi Kumar
22 Mar 2025, 19:00 IST

A variety of conditions ranging from sinus infections to neurologic disorders can precipitate olfactory hallucinations or phantom smells. Identification of the underlying causes can assist in their diagnosis and management. Tap to read!

Sinus Infections

Sinus infections inflame the cavities in the nose, thereby causing nasal congestion through which smell is distorted, thus sometimes producing olfactory hallucinations.

Upper Respiratory Infections

Upper respiratory infections may affect the olfactory bulb, distorting perception thereof or even creating phantom smells, that is, olfactory hallucinations.

Allergies

Allergies can inflame nasal passages and create abnormal perceptions of smell, which can lead to olfactory hallucinations or sensing things that aren't there.

Nasal Polyps

Nasal polyps obstruct airflow, affecting smell and non-existing or altered smell perception.

Migraines

Migraines may cause sensory alterations of perception, such as smell-related hallucinations wherein the person smells something that isn't there.

Information credit

This information is sourced from the Cleveland Clinic. However, it is advisable to consult a healthcare professional for personalised suggestions.