What are the common causes of an inability to sleep and how can it be treated?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Insomnia is difficulty falling asleep, staying asleep, or waking too early. Common causes include stress, anxiety, poor sleep habits, caffeine, medications, or underlying medical conditions like sleep apnea, thyroid issues, or depression. Treatment often includes improving sleep hygiene, relaxation techniques, cognitive behavioral therapy (CBT-I), and in some cases, prescription or over-the-counter sleep aids.

Because insomnia can stem from many different causes—some lifestyle-related, others medical—identifying the root issue is the fastest path to better sleep. A free, instant, online symptom check can help you pinpoint what may be driving your sleep problems and guide you toward the right next steps, whether that's a simple habit change or a conversation with a doctor.

Reviewed for medical accuracy: 07/14/2026

Important Next Steps

Discover what’s causing your sleeplessness Find out if insomnia needs care today Learn if your sleep trouble is serious See OTC options for better sleep Find a doctor for sleep problems Discover home remedies for insomnia relief Understand likely causes of insomnia now

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Explanation

Insomnia means having trouble falling or staying asleep. It can happen for many reasons.

Common Causes:

Stress: Worry or stress can keep your mind too busy to sleep.
Poor Sleep Habits: Watching TV or using phones in bed can make it hard to fall asleep.
Medical Problems: Some illnesses or pain can make sleeping tough.

How to Treat Insomnia:

Good Sleep Habits: Try going to bed at the same time every night and make your bedroom dark and quiet.
Relaxation: Doing calming activities before bed, like reading or listening to soft music, can help.
Medicine: Sometimes, doctors may suggest medicine to help, but it's usually best to try other ways first.

If you're experiencing ongoing sleep problems and want to understand what might be causing them, you can use a free AI symptom checker to get personalized insights. If you feel worried or stressed, it's important to talk to someone who can help, like a counselor.

(References)

Sutton EL. (2021). Insomnia. Annals of internal medicine, 33683929.
Lareau SC, & Bonnet MH. (1985). Sleep disorders: insomnias. The Nurse practitioner, 4047525.
Hauri PJ, & Esther MS. (1990). Insomnia. Mayo Clinic proceedings, 2195248.

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