Letter to the Editor

Rhinitis-induced anosmia leads to the disappearance of olfactory-triggered migraine attacks Dear Editor, Many conditions have been shown to provoke migraines and most patients have one or more typical precipitating factors. Odours are one of the trigger fac-tors known to provoke migraines with relative ease and frequency (1). Osmophobia is more common in patients with migraine than in other headache disorders, and its presence can help distinguish migraine from other pri-mary headaches (2). Previous studies have suggested that the relationship between odour and migraine involves the peripheral trigemino-nociceptive system or neuronal hyperexcit