Cause and Effect of Stay Up Late

Ever since I was a student, I often stay up late. There are some tasks that should I do until I spent all night to do it. Beside that, if there is a test, it also can make me stay up late. the effect is I will feel so tired when I woke up in the morning. Then, it's so hard to walk toward the bathroom, take a bath, preparing my self, and go to campus. Sometimes, after I studied up until I stay up late, all of the material the which I studied before were disappear  Because I got an error in my brain. Stay up late Also give a bad effect to my health. My body resistance decreases so I susceptible to disease. In addition, I also often feel dizzy.

Another thing about cause and effect of stay up late is, if you had studied hard all the night, sometimes you will not be Able to wake up when you have AB Earlier period. It will be so pity for you, especially when you have a test in AB period. I think, all of you will understand what I mean. : D