What Is Insomnia? Insomnia is considered to be a complicated situation in which one is not able to fall asleep or stay asleep. People who are experiencing insomnia are dissatisfied with their sleeping pattern. They feel this constant unease at the time when they are supposed to sleep. Like all other disorders, insomnia also has its symptoms which help in identifying if one is experiencing it. Mostly for such state the symptoms are low energy, fatigue, mood disturbances, difficulty concentrating and poor or ineffective performances at school or work. This disorder is affecting millions of people in the worldwide.