Vertigo: a person feels as if the world around them is spinning, or that they are spinning, or the spinning is in their head. Vertigo can be caused by different medical conditions; when it happens because of a migraine it is called "migraine-associated vertigo". It may happen before a migraine headache starts or during the headache, but vertigo is most common during the period of time between headaches. Many people who have migraines have vertigo or dizziness as the main symptom instead of a headache.