Our Services
Medical Information
Helpful Resources
Published on: 7/21/2026
Sleep apnea is a sleep disorder that repeatedly interrupts your breathing throughout the night, often leaving you feeling exhausted during the day. Common symptoms include excessive daytime fatigue, difficulty concentrating, brain fog, and trouble thinking clearly.
Because untreated sleep apnea can affect your health, mood, and productivity, it's important to understand what may be causing your symptoms. Taking a free, instant, online symptom check can help you identify possible causes and guide your next steps toward feeling better.
Reviewed for medical accuracy: 07/20/2026
Not seeing your question? No worries.
Submit your own QuestionSleep apnea is a condition where breathing stops and starts during sleep. This can lead to feeling very tired during the day, which is called daytime fatigue. People with sleep apnea often have trouble concentrating and remembering things.
Studies have shown that people with sleep apnea can have problems with thinking and concentrating. They might find it hard to do things that need a lot of brain power, like solving puzzles or remembering lists. If you're experiencing persistent fatigue, difficulty concentrating, or suspect you might have sleep apnea, take our free symptom checker to better understand your symptoms and get guidance on next steps for proper treatment.
(References)
Gagnon K, Baril AA, Gagnon JF, Fortin M, Décary A, Lafond C, et al. (2014). Cognitive impairment in obstructive sleep apnea. Pathologie-biologie, 25070768.
Jackson ML, Howard ME, & Barnes M. (2011). Cognition and daytime functioning in sleep-related .... Progress in brain research, 21531244.
Cheshire K, Engleman H, Deary I, Shapiro C, & Douglas NJ. (1992). Factors impairing daytime performance in patients with .... Archives of internal medicine, 1546916.
We would love to help them too.
For First Time Users
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.