Excessive daytime sleepiness happens when you frequently feel very sleepy during the day.

It’s often a sign that you’re not getting enough sleep at night, but sometimes people experience excessive daytime sleepiness even after a full night’s sleep.

A variety of health conditions may contribute to difficulty sleeping or excessive daytime sleepiness, including:

  • sleep-wake disorders, such as:
    • obstructive sleep apnea
    • restless leg syndrome
    • delayed sleep-wake phase disorder
    • narcolepsy
    • idiopathic hypersomnia
  • mental health conditions, such as:
    • anxiety
    • depression
    • substance use disorder
  • physical health conditions, such as:
    • chronic pain
    • hyperthyroidism
    • type 2 diabetes
    • asthma or other breathing disorders
    • gastroesophageal reflux disease (GERD)

It’s important to talk with your doctor if you think you’re experiencing excessive daytime sleepiness. They’ll ask about your symptoms and sleep habits. They may order tests or refer you to a specialist if they suspect that a sleep-wake disorder or other health condition is causing your symptoms.

Take the quiz below to learn if you may have excessive daytime sleepiness. This quiz can’t diagnose excessive daytime sleepiness, but it may help you recognize the potential signs.