Insomnia Insomnia is the ability to fall asleep or to stay asleep for a sufficient amount of time during regular sleeping hours. Adults need 7-8 hours of sleep, on average, but people need less as they get older, and elderly people may need as little as 5-6 hours. An occasional sleepless night won’t do any harm, although feeling tired the next day. It is often caused due to stress, anxiety, or depression and may leave person continually tired, irritable, and unable to concentrate. Constipation, dyspepsia, overeating at night, excessive intake of tea or coffee, smoking, and going to bed hungry are among the other causes. Often, worrying about falling asleep is enough to keep one awake. Physical symptoms such as pain, breathing problems, and hot flashes, and some medicines, can also disturb sleep.
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