National Jewish Health insomnia expert, Jack Edinger, PhD, explains the daytime negative impact of insomnia or sleeplessness. Insomnia can cause fatigue, concentration problems, memory disturbances, mood problems and performance issues at work.
Insomnia is the difficulty getting asleep, difficulty staying asleep, waking up too early in the morning, not having logged enough sleep time or any combination of those sleep symptoms, associated with some daytime negative impact.
So, usually daytime fatigue, concentration problems, memory disturbance, mood problems, irritability, sometimes work performance suffers, depending how severe the case is.
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