Insomnia or lack of adequate sleep includes any combination of difficulty with falling asleep, staying asleep, intermittent wakefulness, and early-morning awakening. This may be for a short-term (lasting 2 to 3 weeks). Illness, depression, anxiety, stress, poor sleeping environment, caffeine, abuse, alcoholism, heavy smoking, physical discomfort, daytime napping, certain medical conditions, and other sleeping habits like going to bed early, and excessive time spent awake in bed are common factors associated with insomnia.

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