Sleep disturbance is a worldwide human problem. A huge number of people around the world suffer from insomnia. For example, one in three Americans is tormented from this disorder. It can only be described as a disease. Such sciences as neurology and psychiatry are engaged in the study and treatment of sleep disorders (insomnia).
There are over a hundred different abnormalities and sleep disorders. Insomnia is one of the most common sleep disorders. We can distinguish three phases: a violation of sleep (the most common); maintenance of sleep; early final awakening. Often the causes of insomnia can be such simple factors as the stuffy room, infectious disease, long-term pain (aching tooth), stressful situations at home or at work. The absence of full sleep entails further deterioration of health, reduction of the body’s resistance, and hence the emergence of new diseases. It is often the cause of accidents.
The first signs of the disease can be inattention, irritability, nervousness. The appearance also shows symptoms of insomnia: edema under the eyes, red eyes, dry mouth, drowsiness, depression. It is also known that insomnia is inclined to its chronicity, and predominantly in the adult organism. So, it is worth noting that insomnia can be acute and chronic disease. In the first case the matter concerns the violation of sleep phase lasting less than three weeks, and the second – more than the specified period.
It is important to understand that the symptoms may reflect other diseases. In this regard, the doctor should properly distinguish insomnia from other more serious diseases of the body, and which could cause the disturbed sleep phase.
This work will help to give a precise definition of insomnia according to the Diagnostic and Statistical Manual of Mental Disorders and to understand this question more specifically.