Olfactory hallucinations may be vital indicators of underlying well being points. In some circumstances, phantom smells might end result from sinus and respiratory points, like sinusitis and nasal polyps, which may disrupt air and mucus stream within the nasal passages, resulting in an altered notion of odors. It could comply with a extreme respiratory an infection, similar to COVID-19, in keeping with Mayo Clinic. It may also be introduced on by dental issues (per Cleveland Clinic).
The examine in Continuum states that phantosmia is a typical symptom of a head damage that has broken the olfactory nerve or the olfactory cortex, which is answerable for processing odor. Moreover, phantosmia may be related to numerous medical circumstances, together with Parkinson’s, Alzheimer’s, a number of sclerosis, and epilepsy. It may also be a facet impact of sure drugs, similar to antidepressants and anticonvulsants.
In response to a 2022 report in Frontiers in Behavioral Neuroscience, psychological components similar to stress, nervousness, and drugs also can affect the notion of phantom smells, as emotional and psychological misery might trigger the mind to misread sensory knowledge, leading to olfactory hallucinations.