Insomnia is a health problem of many teenagers in MFU. Insomnia effect on extreme mental states and living daily life. There are 3 main causes that cause to insomnia. Firstly, some physical reason is causing insomnia, for example; patients with heart disease or lung disease patients. Secondly, the environment should be quietly or clear to appropriately to sleep. The environment is an important factor to sleep and pathogenic insomnia. The last cause is that it is a depression or thinking over. Patient's insomnia does not dare to tell others or someone close that has a trouble sleeping because of fear of being seen as psychological problems.