Delayed sleep-wake phase disorder affects the body’s biological clock, causing a person to fall asleep and wake up two or more hours later than usual.
What is delayed sleep-wake phase disorder?
This condition occurs when the body’s internal clock, known as the circadian rhythm, is not synchronized with the surrounding environment. This issue leads to difficulty waking up at scheduled times for work or study; for example, an affected person may fall asleep at 3 AM and wake up at 10 AM. These patterns typically persist for at least three months and may extend for years.
This condition appears across various ages but is more common among adolescents and young adults. Certain behaviors may exacerbate the situation, such as staying up late to browse the internet, watch television, or complete school assignments.
Symptoms of delayed sleep phase
The delay in sleep and wake times usually ranges between 3 and 6 hours. Symptoms include:
- Feeling extremely sleepy and having difficulty staying awake during the day.
- Insomnia or the inability to fall asleep at conventional times.
- Great difficulty waking up in the morning for school or work.
Diagnosis and Treatment
To diagnose the condition, a doctor reviews the patient’s and family’s medical history and may request the following tests:
- Sleep diary: Recording daily sleep and wake times for a week or more.
- Actigraphy: Wearing a small device around the waist to track movement and light exposure.
- Polysomnography: An overnight stay at a specialized center to monitor respiratory functions, heart rate, brain activity, and eye movements.
Regarding treatment, a plan is developed to adjust sleep schedules, which includes:
- Lifestyle modification: Adhering to fixed sleep and wake times even on holidays, avoiding naps, and abstaining from caffeine, tobacco, and alcohol before bed. It is also recommended to exercise at least two hours before bedtime and reserve the bed for sleep and intimacy only.
- Light and Chronotherapy: Using a light box in the morning or following a program that gradually shifts bedtime by one to two and a half hours every six days.
- Supplements: A doctor may recommend taking melatonin in the early evening to reset the biological clock.
Complications and Prevention
This disorder may lead to declining academic performance and behavioral problems in adolescents, such as ADHD. It is also linked to autism spectrum disorder and may cause anxiety and depression.
For prevention, it is advised to reduce exposure to screens and bright lighting before bed and follow a regular sleep schedule.
When to Visit a Doctor?
Healthcare should be sought in the following cases:
- The appearance of persistent sleep disorder symptoms.
- Noticing a habitual difficulty in waking up in the morning for a person or child.
- Feeling excessive sleepiness during daylight hours.
FAQ
How can I support someone with this condition at home?
You can help the patient by lowering the lights, providing a quiet environment, and turning off electronic devices two hours before the intended bedtime.
Does this condition affect mental health?
Yes, it may lead to depression and anxiety. It is therefore recommended to inform the medical team when these symptoms appear to receive appropriate treatment.
What should I bring to the doctor’s appointment?
It is preferable to prepare a list of symptoms and when they started, the family medical history, and a list of all medications and supplements along with their dosages.
Medical Disclaimer: This content is for informational purposes only and does not substitute for professional medical advice.
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Illustration: AI-generated
approved by: Medica Health team