Hi JodieLyn,   Yes, olfactory hallucinations can occur during the aura phase of a Migraine attack. Chronic Migraine as described by the International Headache Society's International Classification of Headache Disorders ICHD, 2nd edition, is Migraine without aura or tension-type headache pain more than 15 days per month for longer than 3 months. I don't have a diagnosis of Migraine with aura, but do have difficulty finding some words when I have a particularly nasty Migraine attack.     Many people think of aura as only a visual issue, but there are lots of other symptoms that can be part of this phase; confusion, dizziness, difficulty finding words or speaking, tingling or numbness of the face or in extremities on the same side as the headache develops, olfactory hallucinations, auditory hallucinations - hearing things that aren't there and allodynia which is being extra sensititve to touch and feel. To continue learning more about aura and the phases of a Migraine, read Anatomy of a Migraine.   I hope this helps, Nancy