Sleep is an important part of our lives. It not only allows the body to recover and repair itself , but it also allows the brain to dream. Dreaming is a way of resolving emotional issues that have occurred during the day. If this didn't occur then the conscious mind would get overloaded.
We all know how it feels when we have not had a good night's sleep - not only tired but it also can affect us psychologically and emotionally. This will affect how our day progresses, and if this goes badly then it will affect us emotionally and psychologically in a negative way. This results in more to dream about. Dreaming uses up as much energy as being awake, so if excessive, it will make us feel exhausted the next day. If this cycle continues this may eventually lead to depression.
There are many reasons for not sleeping. Pain and illness may affect sleep as well stress and anxiety. Some of us get into a habit of not sleeping well or do not have the right environment conducive for sleep. Then there are the worriers, and clock watchers. Whatever it is, bad habits can be unlearned and better habits put in their place. It is not important how many hours sleep you get, but that you wake refreshed and ready to face the day.
As the deeper trance state of hypnosis is mid way between wakefulness and sleep, hypnosis is very effective in helping insomnia.