Insomnia simply refers to a sleep disorder in which an individual finds it difficult to fall asleep or stay asleep. In some, one of the experiences is that they keep waking up too often during the night. The inability to have a good length of sleep can cause series of problems. It may lead to anxiety and depression, tiredness during daytime etc. Insomnia can be classified based on how frequent it is occurring. It can be classified as acute and chronic.
Acute insomnia is also known as short term, which means it occurs for just a limited period of time. A person having acute insomnia might experience this for just a day in a week and it might run for weeks. However, insomnia can be considered severe if it has become chronic. Chronic insomnia is when an individual is having sleepless night for three days in a week and it runs to at least three months.
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