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  1. Insomnia - Symptoms and causes - Mayo Clinic

    Jan 16, 2024 · Insomnia may be the main problem or it may be related to other conditions. Long-term insomnia is usually due to stress, life events or habits that disrupt sleep.

  2. 13 Medical Conditions That Cause Insomnia - WebMD

    Jun 19, 2025 · Find out what medical issues can cause problems falling or staying asleep -- even when you want to -- and what you can try to do about insomnia.

  3. Insomnia: What It Is, Causes, Symptoms & Treatment

    Explanation: Insomnia isn’t happening because of substances, medications or other sleep disorders. Physical or mental health disorders also can’t fully explain why you’re not sleeping.

  4. What Causes Insomnia? - Sleep Foundation

    Jul 10, 2025 · Common causes of insomnia include stress, an irregular sleep schedule, poor sleeping habits, mental health disorders, physical illnesses and pain, medications, neurological problems, and …

  5. What Causes Insomnia | Sleep Medicine - Harvard University

    Oct 1, 2021 · It is well-known that insomnia often occurs in the setting of various social stressors (e.g., personal loss, social disruption), mental and physical health problems (e.g., heart disease, …

  6. Insomnia - NHS

    What causes insomnia The most common causes of insomnia are: stress, anxiety or depression noise a room that's too hot or cold uncomfortable beds alcohol, caffeine or nicotine illegal drugs like cocaine …

  7. Insomnia: Causes, Symptoms, Types, and More - Healthline

    Apr 18, 2025 · Causes of insomnia can include stress and chronic conditions. Your age, lifestyle habits, and certain life phases like pregnancy and menopause can also play a role in whether you experience...

  8. Insomnia - Wikipedia

    Patients with some disorders, including delayed sleep phase disorder, are often misdiagnosed with primary insomnia; when a person has trouble getting to sleep and awakening at desired times, but …

  9. Insomnia: Causes, Symptoms, What to Do When You Can't Sleep

    May 14, 2026 · Emotional issues such as stress, anxiety, and depression cause half of all insomnia cases. But your daytime habits, sleep routine, and physical health may also play a role. Try to …

  10. What Causes Insomnia? 9 Triggers Doctors Explain (2026)

    Mar 25, 2026 · Can't sleep? Discover 9 medical and lifestyle insomnia triggers — from anxiety to medications — with expert-backed causes and fixes.