"Never believe straightaway in peoples’ misfortune. Just ask them if they are still able to sleep? If the answer is yes, then everything’s allright. It’s enough."
(Louis Ferdinand Destouches called Céline "Journey to the end of the night")
Insomnia is the illness of someone who suffers from being awake when he/she wishes to sleep.
That suffering is amplified by the conjunction of two factors :
Vicious circle of acquired insomnia.
It is a complaint : The person observes during the night that he/she doesn’t sleep properly and complains about it. Nevertheless, to sleep poorly or little doesn’t alaways mean to be insomniac : there exist short sleepers and people who shorten their nights whithout any troubles. In both cases, there is no complaint, they are not insomniacs.
Is the difference only psychological ?
No, there is no specific type of personality for individuals who suffer from insomnia.
According to certain studies, some psychological characteristics or traits might though predispose to the illness :
Initial insomnia, maintaining sleep insomnia or terminal insomnia?

Already 1 AM, yet Mathéo went to bed early
He has been trying to sleep for three hours.
Usually, he takes a long time to fall asleep, but he stays in bed because he thinks that will, at least, provide him a little rest.
He has drunk a herbal tea meant to help him go to sleep, with a couple of tablets of plant medications, tried to empty his mind, count sheeps, concentrate on his breathing, ... in vain.
He has heard all the noises from the neighborhood, the neighbor’s clock, the noise of the fridge, the ticking of the alarm clock.
No technique seems to be able to help him get rid of the ideas that spin endlessly in his head. In the opposite, he becomes more and more awake and anxious, turning over and over again in his bed, in search of a comfortable position, propitious to sleep.
Two hours ... three hours ... he calculates how much time is left until he has to get up to go to work. When the alarm clock rings in the early morning, he feels totally exhausted and gets up with the feeling that he hasn’t shut his eyes.
The days off work, he takes advantage of that morning sleep that allows him to recover but... of late...he doesn’t always manage to fall asleep!
Sometimes Mathéo wonders if he is going to become crazy.

All night long, Ferdinand looses all his time. In the evening, he goes to bed exhausted as soon as he can and falls asleep in five minutes but, with no apparent reason, wakes up almost every hour.
- Sometimes, he can fall asleep again, he is very careful not to move in order not to wake up completely.
- Sometimes, too, he experiences a lot of trouble going back to sleep but he prefers to stay in bed. He casts an eye on his alarm clock, once, twice, ten times...
- Rarely, he gets up, spends a part of the night up, but it makes him nervous to think about how tired he will be during the day. He gets angry with himself and wonders what he is doing up while everybody else is asleep. He ends up going back to bed around 5 or 6 a.m. and, when the alarm clock rings, he has to make a prodigious effort to get out of bed.
He has made up his mind : tomorrow, he will talk about it with his doctor.

Every morning, Mireille wakes up, without being able to fall asleep again.
She generally falls asleep quite easily in the evening (sometimes, she takes a little pill ("it can help") but never sleeps more than five or six hours.
In the early morning, she hears the noises from the street, goes to the toilet, goes back to bed, hoping to fall asleep again before the alarm clock rings for her to go to work.
Mireille panics, her thoughts are pessimistic, keep up like that much longer, but how is she supposed to do, what with the house, the children, shopping...
She dreams, her thoughts wander aimlessly, she doesn’t know anymore about anything, her mind is worried all that time.
When the alarm clock goes off, she thinks that she was not sleeping, she feels drained, heavy and stiff, and more tired for the day ahead than she was the day before...
Her neighbour told her that she was depressive, that she should talk to her doctor.
In fact, there is no unique definition of insomnia. There exist many individual differences when it comes to the needs of sleep of every person. Some very short sleepers consult because they don’t stand to sleep less than their partner... though they have no disorder at all (neither sleepiness nor functional disorders). (The real problems start in case of untimely use of sleeping pills !).
Insomnia results from the shift between the way sleep is experienced (sleep onset latency, continuity and duration) and the expectations in terms of satisfaction and efficiency (sensation of rest, performance and vigilance during the day).
The experience of everyone is that a «bad night» often results in a gloomy day with troubles with memory and concentration.
The insomniac patient lives with the terror to renew the experience.
That is the starting point of a true vicious circle where the fear to sleep badly finds its justification in the certainty that the next day will be ruined.
Insomnia is a subjective experience and that subjective perception of sleep does not always correspond to the real physiological sleep, as measured with the electroencephalographic recording. We observe, for example, that the insomniacs have a tendency to overestimate the time they have to wait to fall asleep and underestimate their total sleep time. When they are woken up in stage I or II (i.e. during light sleep), they often claim they were awake while good sleepers are more likely to say they were asleep.
The habit has been taken to distinguish two types of insomnia. In fact, it is rare that insomnia depends on a unique factor. It is the resultant of several components (event related, behavioral, cognitive, psychological) which have repercussions on the person’s physiology through activation, excitement phenomenons, incompatible with a good sleep.
The surveys show that :
There exist several causes of sleep dirturbance : psychiatric, medical, pharmacological, environmental... Some people are more vulnerable than others, but almost everybody can develop sleep disorders in the presence of stressing events of life for example.
It is called occasional or reactional insomnia. Such an insomnia is generally limited in time but the moral pain associated with it leaves the subject who ,in the opposite hopes to sleep in order to forget his/her troubles, the painful memory of a true "sleepless night".
The awakening is tainted with dark thoughts but the daytime performances of the subject are not objectively affected.

Yet, for a large amount of persons, the disorder persists. It is here that the "psychological" factors play a major role in the development of insomnia which becomes gradually chronic.
The term of psychological factors describes, in that context, behaviours, attitudes, beliefs regarding sleep.
Some of these learned reactions are incompatible with a good sleep and maintain the disorder. That type of insomnia is referred to as "learned insomnia".
According to our experience, these situations of physiological insomnia reveal a preexisting loss of confidence towards sleep, often acquired in early childhood.
Childhood is a period of great vulnerability (unrestrained imagination) where the parents’ errors quickly lead to the fear of sleeping. The short sleeping children are particularly exposed to insomnia because they get used very young to wait for the sleep to come. See the child’s sleep.
Apart from these bad habits and irrational thoughts, another factor is implicated in the constitution of a chronic insomnia; it is the excitement (the physiological activation) of the arousal systems :
The chain reaction; the cascade that maintains and aggravates an occasional insomnia that occurs on a predisposed ground :

and ...
Read, here, the rest of the article about "Wanting to sleep : Insomnia"
Smg offers you an interactive sleep disorder screening test : "select the items for which you feel concerned" ... ... "your answers are compatible with the following problem(s)" ... "you should discuss these questions with your doctor".This text is freely adapted from the principles of Cognitive Behavioral Therapy applied to insomnia, used by Professor Charles M. MORIN (sleep specialist at the Laval University in Québec).
We advise you to refer to his book designed for the general public : "Defeat the enemies of sleep" (Marabout santé 3599).