cause of headache

The cause of headache

            I often occur headache. One cause is that I'm under stress.When I have a problem with my friends or family, I feel stress. I tend to thinking things deeply. So I'm very tired. Second cause is that I have fever. My body is hot and then I have a pain in my head. Third cause is that I haven't enough sleep. If I haven't enough sleep, I can't get rid of fatigue. These are cause of headache.