Sleep disorder

A sleep disorder is a problem that stops people from sleeping normally. But really what is normal sleeping? There are many sleep disorders, and some of them are very serious. A test commonly ordered for some sleep disorders is the polysomnogram.
Types of sleep disorders.
Sleep disorders can be put into groups. These groups include:
Common sleep disorders.
The most common sleep disorders include:
Common causes of sleep disorders.
Changes in life style, such as shift work change or travelling over several time zones, can cause sleep disorders. Some other problems that can cause sleeping problems include:
Treatment.
A sleep diary or log can be used to help diagnose (define) the problem. It can also be used to measure improvements. 
According to Dr. William Dement of the Stanford Sleep Center, anyone who snores and is sleepy in the daytime should see a doctor about sleep disorders.
In case of chronic pain, both the pain and the sleep problems should be treated. Pain can lead to sleep problems and vice versa.
The choice of a treatment for a sleep disorder depends on the patient's diagnosis, his/her medical and psychiatric history, and how she or he prefers to be treated. Medications sometimes work fast. On the other hand, sometimes behavioral treatment of insomnia may give more lasting results.