Установите последовательность предложений, чтобы получился связный текст.
1_______. It can affect a small portion of the head, such as the eyes or temples, or it can affect the entire head. 2_______. Tension headaches tend to feel like a tightening around the head. Migraine headaches are usually intense and throbbing, often involving one side of the head, although they can affect the entire head. 3_______. There is some thought that an imbalance in the nervous system, especially in the trigeminal nerve, may trigger dilation and inflammation of blood vessels in the head. 4_______.
A headache is pain that occurs in the head and upper neck region of the body
The pain may be sharp or dull, and may come along with a variety of other symptoms like light sensitivity or nausea
As is the case for tension headaches, the cause of migraine headaches is still being researched
This dilation and inflammation is responsible for the pain experienced during a migraine