Blood vessels in the scalp are often involved. It is not known why some individuals have migraines and others do not. There are many forms of migraine headaches. Eyesight may suddenly change. Bright spots or zigzag lines are seen.
Many people experience double vision or temporary, partial blindness.
Any given person may have only one or a few of these symptoms, and they tend to occur in the same combination in each attack. The symptoms may last for 5 to 15 minutes or more. As these symptoms disappear, a throbbing headache begins on one side of the head. The severity of the headache builds. Once the headache becomes very painful, people often have nausea, vomiting, and sensitivity to light and noise.