Most of us think of migraine as a bad headache. But the truth is it is more than just a bad headache. A migraine is a severe headache that can cause debilitating, throbbing, one-sided head pain that can leave you in bed for days. The headache phase of a migraine usually lasts at least four hours, but it can also last for days. Triggers like loud noises, bright lights, strong odors, and physical activities can worsen this headache, causing symptoms like vision changes, fatigue, irritability, and nausea. People who have suffered from migraine say that it is disruptive and can interfere with your daily routine and affect your ability to meet personal and social obligations.