What Is 'Insomnia'? Insomnia in a simple way to understand is ' Sleeplessness.' It is a sleep disorder in which you experience either a lack of sleep or no sleep at all. Some of us find it challenging to get to sleep, no matter how tired. Some of us wake up during sleep in the middle of the night and stay wide awake for hours watching the roof or watching the time and waiting to fall back asleep. This condition can be for a short period, say for a day or a week, or an extended period, say for a month or three months or more. Symptoms of Insomnia : 1. Struggling to fall asleep even if you are very much tired. 2. Waking up again and again during the night sleep. 3. Finding it challenging to go back to sleep when awakened. 4. Feeling tired despite long hours of sleep at night. 5. Waking up too early in the morning every day. Thes