Imagine that morning has come, you have counted all the sheep of this universe, but you have not been able to sleep. This insomnia is a neurological disorder that requires professional intervention.
It would seem that this is a problem that has a simple solution and is temporary, so you do not need to undergo examinations and dive into a comprehensive solution to this issue. But this is not the case.
Insomnia is a disease that requires attention as well as diabetes mellitus, stomach ulcer, impotence, etc. The cause of insomnia is depression, stress, drug use, etc.