Why can't I sleep without a sound?

This situation is due to neurasthenia, autonomic nervous dysfunction, biological clock disorder caused. It is recommended to choose a comfortable and quiet sleep environment when sleeping, usually to develop regular sleep habits, drink hot milk before going to bed, can also promote sleep. Insomnia is more serious patients, can be under the guidance of a doctor with sedative hypnotic drug treatment, during the day can be more physical exercise.