When you are unable to sleep night after night, you feel cranky and annoyed. It becomes challenging to focus on work, and your productivity decreases as a result. Thus, it is significant to treat insomnia as soon as possible. But for that, you would need to know what you are dealing with. So, to help you understand what is insomnia, we have listed its definition and types.For more:https://www.resmed.co.in/insomnia-symptoms-causes-consultation