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Osmophobia

Fear of or hypersensitivity to odors

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Such migraines are most frequently triggered by foul odors, but the hypersensitivity may extend to all odors. One study found as many as 25% of migraine sufferers had some degree of osmophobia. The condition may also be present in individuals in substance withdrawal, specifically opioid withdrawal syndrome, where it is usually associated with nausea and/or vomiting.

The term osmophobia comes from the Greek ὀσμή (osmḗ), meaning "smell, odour", and φόβος (phóbos), meaning "fear". Olfactophobia comes from the Latin olfacto, meaning "to smell at".

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