Insomnia, also known as sleeplessness, is a sleep disorder where people have trouble sleeping. They may have difficulty falling asleep, or staying asleep as long as desired. Insomnia is typically followed by daytime sleepiness, low energy, irritability, and a depressed mood.
Insomnia can occur independently or as a result of another problem. Conditions that can result in insomnia include:
restless leg syndrome
Insomnia can be treated. As soon as insomnia has become a pattern, or you often feel fatigued during the day and it interferes with your daily life, you should seek help.