Delayed Sleep Phase

Diagnosis

Mayo Clinic doctors trained in sleep medicine, including doctors trained in lung and breathing conditions (pulmonary medicine), mental health conditions (psychiatry), brain conditions (neurology) and other areas, evaluate people who have delayed sleep phase.

To diagnose your condition, your doctor may review your family and medical history and conduct a physical examination. Your doctor often will order several tests to diagnose your condition or any other related conditions.

• Actigraphy. In this test, you wear a small device that tracks your sleep-wake behavior at home.
• Sleep diary. Your doctor may ask you to keep a sleep diary in which you log your daily sleep and wake times to help show your sleep pattern.
• Polysomnogram. If your doctor suspects you have a different sleep disorder, he or she may order a polysomnogram. In this test, you stay in a sleep center overnight. A polysomnogram monitors your brain activity, heart rate, oxygen levels, eye movements and breathing function as you sleep.

Read more about polysomnogram.