The actual word “migraine” comes from the meaning of half of the head. And because of it’s name, migraine’s usually inflict pain only on the left or right side of a person’s head. However, many people experience pain on the whole head when undergoing a migraine attack.
Migraine headaches are usually caused by hormonal fluctuations. When hormonal fluctuations occur, they cause blood vessels in the head and neck to contract and resulting to
dilate. The first phase of a migraine headache is called the “contraction phase.” This phase may last up to minutes, hours, or even days to it’s severity. Symptoms of this phase include: Spots in the eyes, cold finger tips, and difficulty in concentration.
The actual headache pains start when the blood vessels start to dilate. Instead of the blood vessels contracting to their normal state, the blood vessels dilate much wider and thats when it starts to cause pain. Apparently, the hormones over-react. Not only do the blood vessels cause the pain, but other causes such as certain chemical releases, muscle tension, swelling of the brain, all contribute to the pain also.