People who have primary insomnia tend to keep thinking about getting enough sleep. The more they try to sleep, the greater the sense of frustration and distress, and the more difficult sleep becomes.
Your health care provider will do a physical exam and ask you questions about your current medications, drug use, and medical history. Usually, these are the only methods needed to diagnose insomnia.
Polysomnography, an overnight sleep study, can help rule out other types of sleep disorders (such as sleep apnea).
Goetz, CG. Textbook of Clinical Neurology. 2nd ed. St. Louis, Mo: WB Saunders; 2003: 1207-1210.
Rakel P, ed. Conn’s Current Therapy 2005. 57th ed. Philadelphia, Pa: WB Saunders; 2005:34-39.