Everyone has trouble falling asleep from time to time; indeed, evidence suggests that 100 percent of adults experience periods of sleeplessness over the course of their lifetime. But a significant ...

Insomnia is a sleep disorder in which you have trouble falling asleep, staying asleep, or waking up too early. The condition can be short term (acute) or can last a long time (chronic). It may also ...

Sudden insomnia is usually a form of acute insomnia, which means that insomnia appears quickly, then lasts for a short time. People with insomnia typically have trouble getting to sleep, staying ...