Insomnia is a sleep disorder that is characterized by difficulty falling asleep, staying asleep, or both. It can be caused by a variety of factors, including stress, anxiety, depression, medication side effects, and medical conditions such as sleep apnea. Insomnia can lead to daytime fatigue, irritability, and difficulty concentrating. Treatment for insomnia depends on the underlying cause and may involve medication, cognitive-behavioral therapy, or other interventions to improve sleep habits and promote relaxation.
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