Migraine
Migraine is a condition when a person experiences severe throbbing headache. The exact cause of migraine is unknown, however, there are several factors like bright light, odor, food, stress, etc., that trigger off this condition. The pain experienced due to migraine usually is felt on only one side of the head. Pain above eyeball, nausea, vomiting, sickness, sensitivity to light and sound are the other symptoms of migraine.