Migraine is a neurological disorder that can be very distressing and disabling. Typically it is a one-sided throbbing or pulsating headache that is at least moderately intense and can be aggravated by physical activity. It is very often associated with nausea and vomiting, as well as increased sensitivity to light, sound and even some types of smell.
In contrast, tension headache, another headache type, is usually felt on both sides of the head. It is a pressing or tightening sensation rather than a throbbing headache and is not made worse by activity or accompanied by nausea.