Insomnia is a sleep disorder. People with insomnia have either trouble falling asleep, staying asleep, or both. There are to main forms of insomnia: primary insomnia where people experience trouble sleeping without any underlying medical conditions that might cause them, and secondary insomnia, where the problems with sleeping are caused by another medical condition or a substance the person has been taking. Conditions that can cause secondary insomnia are e.g. pain, heartburn, asthma, depressio...
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