A migraine is a common type of headache that may occur with  symptoms such as nausea, vomiting, or sensitivity to light. In many people, a  throbbing pain is felt only on one side of the head.
Some people who get migraines have warning symptoms, called  an aura, before the actual headache begins. An aura is a group of symptoms,  usually vision disturbances, that serve as a warning sign that a bad headache  is coming. Most people, however, do not have such warning signs.Symptoms
Vision disturbances, or aura, are considered a "warning  sign" that a migraine is coming. The aura occurs in both eyes and may  involve any or all of the following:
    A temporary blind spot
    Blurred vision
    Eye pain
    Seeing stars or zigzag lines
    Tunnel vision
Not every person with migraines has an aura. Those who do  usually develop one about 10 - 15 minutes before the headache. However, it may  occur just a few minutes to 24 hours beforehand.
Migraine headaches can be dull or severe. The pain may be  felt behind the eye or in the back of the head and neck. For many patients, the  headaches start on the same side each time. The headaches usually:
    Feel throbbing, pounding, or pulsating
    Are worse on one side of the head
    Start as a dull ache and get worse within minutes to  hours
    Last 6 to 48 hours