Headache
Today, I was painful with a headache. I don't know the reason of my headache. Therefore, I searched on the Internet. There are several reasons, so I will write about them. The first reason is stress. Now, I have tests, so I have to study a lot. That may be the reason. Second reason is lack of water. If people don't have enough water, blood circulation deteriorates. I will be careful about lack of water.