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Sleep Disorders
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Brain Nerves

Sleep Disorders

Sleep disorders are conditions that disturb normal sleep patterns, potentially impacting physical health, mental well-being, and daily functioning.

What is Sleep?

While you are sleeping, your brain and body functions are still active. Sleep is a natural process that helps your body restore energy, supports learning and memory, and keeps you healthy.

It's not just the number of hours of sleep you get that matters; the quality of your sleep is also important. During the night, your brain cycles through different stages of non-rapid eye movement (non-REM) sleep and rapid eye movement (REM) sleep. If your sleep is often interrupted, you may not get enough time in certain stages of sleep. Poor-quality sleep does more than make you feel tired; it can affect your physical and mental health, thinking, and daily functioning.

Types of Sleep Disorders

Sleep disorders are conditions that disturb your normal sleep patterns. General types include:

  • Insomnia: Trouble falling asleep or staying asleep.
  • Sleep-related breathing disorders: Such as sleep apnea, a condition in which you stop breathing for 10 seconds or more during sleep.
  • Sleep-related movement disorders: Such as restless leg syndrome (RLS), which involves tingling or prickling sensations in your legs, and a strong urge to move them.
  • Hypersomnia: Extreme daytime sleepiness, including narcolepsy.
  • Circadian rhythm sleep-wake disorders: Problems falling asleep or waking up at the right times, which may be due to shift work or jet lag.
  • Parasomnia: Unusual behaviors during sleep or while falling asleep or waking up, such as sleepwalking, talking, or eating during sleep.

Causes and Risk Factors

There are different causes for different sleep disorders, which may include:

  • Other health conditions, such as heart disease, lung disease, nerve disorders, or pain
  • Mental illnesses, including depression and anxiety
  • Medicines
  • Genetics

Sometimes the cause is unknown. Other factors that may contribute to sleep problems include using caffeine or alcohol, having an irregular schedule (such as night shifts), or aging.

Symptoms

Signs that you may have a sleep disorder include:

  • Regularly taking more than 30 minutes to fall asleep.
  • Regularly waking up several times with trouble falling back to sleep, or waking up too early.
  • Often feeling sleepy during the day, taking frequent naps, or falling asleep at the wrong times.
  • Snoring loudly, snorting, gasping, making choking sounds, or stopping breathing during sleep.
  • Creeping or tingling sensations in your legs or arms relieved by moving or massaging them.
  • Legs or arms jerking often during sleep.
  • Vivid, dreamlike experiences while falling asleep or dozing.
  • Episodes of sudden muscle weakness triggered by strong emotions.
  • Feeling as though you cannot move or speak for a brief time when you first wake up.

Diagnosis

To diagnose a sleep disorder, your health care provider will review your medical and sleep history and perform a physical exam. You may also have a sleep study (polysomnogram), which monitors data such as brain wave activity, eye movements, breathing rate, blood pressure, and heart rate during a full night of sleep.

Treatment and Management

Treatments depend on the specific disorder and may include:

  • Practicing good sleep habits and lifestyle changes, such as a healthy diet and regular exercise.
  • Reducing anxiety about sleep with cognitive behavioral therapy or relaxation techniques.
  • Using a CPAP (continuous positive airway pressure) machine for sleep apnea.
  • Using bright light therapy.
  • Taking sleep aid medicines or natural products such as melatonin.

Always check with your provider before taking any medicine or supplement, as most sleep aid medicines are generally for short-term use.

Frequently Asked Questions

If sleepwalking involves walking near stairs, using sharp objects, or driving a vehicle, it poses a high risk of injury. Install safety gates, lock doors, and remove hazards from hallways. If the behavior is frequent or escalates, consult a sleep specialist for evaluation and possible treatment such as medication or behavioral therapy.
Track sleep patterns for at least two weeks, noting bedtime, wake time, and number of awakenings. If you consistently have trouble falling asleep or staying asleep for more than 3–4 nights per week, despite adequate sleep hygiene, it may indicate a disorder. A sleep diary combined with a brief questionnaire (e.g., the Insomnia Severity Index) can help differentiate chronic insomnia from situational stress.
Initial steps include weight loss, positional therapy, and avoiding alcohol or sedatives before bedtime. If a sleep study confirms moderate to severe apnea (apnea‑hypopnea index ≥15), continuous positive airway pressure (CPAP) is the gold standard. CPAP should be considered when symptoms persist after lifestyle changes or if the apnea index is high, as it reduces cardiovascular risk and improves daytime alertness.
Iron deficiency is a common trigger; ensure adequate intake of iron‑rich foods such as lean red meat, beans, lentils, and fortified cereals. Vitamin B12 and folate also support nerve function; include fish, eggs, dairy, leafy greens, and citrus fruits. Staying hydrated and limiting caffeine or alcohol in the evening can reduce RLS symptoms.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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