For other uses, see Insomnia (disambiguation). Insomnia is characterized by an inability to sleep and/or to remain asleep for a reasonable period. Insomniacs typically complain of being unable to close their eyes or "rest their mind" for more than a few minutes at a time. Both organic and nonorganic insomnia constitute a sleep disorder [1] [2]. It is oftenly caused by fear, stress, anxiety, medications, herbs or caffeine. An overactive mind or physical pain may also be a cause. Finding ...
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Surgery and Insomnia
... Is it common to have trouble sleeping after surgery? Yes. Many people complain of having trouble sleeping for some time after surgery. You may experience insomnia (an inability to sleep) because of: T...
Source: Cleveland Clinic

Signs and symptoms
... Signs and symptoms of insomnia may include: Inability to get enough sleep at night Difficulty falling asleep at night Waking up during the night Waking up too early Waking up feeling tired, even after...
Source: MayoClinic

... Common causes of insomnia include: Stress. Concerns about work, school, health or family can keep your mind too active, making you unable to relax. Excessive boredom, such as after retirement or durin...
Source: MayoClinic

When to seek medical advice
... If insomnia has been severely interfering with your daytime functioning for a month or longer, see your doctor to determine what might be the cause of your sleep problem and how it might be treated.
Source: MayoClinic

Screening and diagnosis
... Insomnia may be difficult to diagnose because of its partly subjective nature and because so many factors can affect your sleep. Also, the kind of sleep patterns and degree of daytime fatigue that som...
Source: MayoClinic