What is considered a sleep disorder, and how is it diagnosed?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Sleep disorders are medical conditions that affect the quality, timing, or duration of sleep, such as difficulty falling asleep, staying asleep, or remaining awake during the day. Common examples include insomnia, sleep apnea, restless legs syndrome, and narcolepsy. Doctors diagnose sleep disorders by reviewing symptoms, medical history, and using specialized tests like sleep studies (polysomnography).

If you're experiencing sleep issues, understanding the potential cause is the first step toward better rest. Take a free, instant, online symptom check to explore what may be behind your symptoms and get guidance on next steps. It's fast, private, and can help you make informed decisions about your health before booking a doctor's visit.

Reviewed for medical accuracy: 07/20/2026

Important Next Steps

Learn if sleep problems need care today Discover likely causes of sleep disorders See whether your sleep issues are serious Find OTC options for sleep troubles Find a sleep specialist near you Understand home remedies for sleep problems Find out if it could be a sleep disorder

Not seeing your question? No worries.

Submit your own Question

Explanation

Sleep disorders are conditions that affect how well you sleep. They can make it hard to fall asleep, stay asleep, or stay awake when you need to. Some common sleep disorders include insomnia, sleep apnea, and restless legs syndrome.

How is a Sleep Disorder Diagnosed?

Symptom Check: Doctors will ask about your sleep patterns and any problems you are having.
Sleep Diary: You might be asked to keep a diary of your sleep habits for a few weeks.
Sleep Study: Sometimes, doctors will use a special test called a sleep study to watch how you sleep. This can help them find out what is wrong.

Sleep disorders can affect your health and how you feel during the day. If you think you have a sleep disorder, it is important to talk to a doctor. Before your appointment, you can check your symptoms online to better understand what might be causing your sleep issues. A healthcare professional can help find out what is wrong and how to make it better.

(References)

Gauld C, Lopez R, Morin C, Geoffroy PA, Maquet J, Desvergnes P, et al. (2022). Symptom network analysis of the sleep disorders .... Journal of sleep research, 34269498.
Sateia MJ. (2014). International classification of sleep disorders-third edition. Chest, 25367475.
Gauld C, Lopez R, Philip P, Taillard J, Morin CM, Geoffroy PA, & Micoulaud-Franchi JA. (2022). A Systematic Review of Sleep-Wake Disorder Diagnostic .... Biomedicines, 35884924.

Thinking about asking ChatGPT?Ask me instead

Tell your friends about us.

We would love to help them too.

For First Time Users

What is Ubie’s Doctor’s Note?

We provide a database of explanations from real doctors on a range of medical topics. Get started by exploring our library of questions and topics you want to learn more about.

Was this page helpful?

Purpose and positioning of servicesUbie Doctor's Note is a service for informational purposes. The provision of information by physicians, medical professionals, etc. is not a medical treatment. If medical treatment is required, please consult your doctor or medical institution. We strive to provide reliable and accurate information, but we do not guarantee the completeness of the content. If you find any errors in the information, please contact us.