Sometimes, just before I fall asleep, I feel paralyzed. I can think, but I can't take in air, and when I think about moving, my body won't respond to that thought. What's going on?
– Kayleigh*

Although we can't say what's going on in your particular situation, there is a medical condition known as sleep paralysis.

Sleep paralysis is rare. But it can be scary if the person doesn't know what's happening: Someone with sleep paralysis temporarily loses the ability to speak or move while falling asleep or waking up. This sensation can last for seconds or even a couple of minutes. Some people may also have hallucinations. During an episode of sleep paralysis, people may feel like they can't breathe, but this is not the case — a person continues to breathe throughout the episode.

Sleep paralysis can happen just once and never again. But, for a few people, it may be a regular occurrence. Either way, it can be a big relief to know what's happening. That's why the best course of action is to see a doctor and get checked out.

If you do have sleep paralysis, a doctor can help figure out why it's happening. The condition may be linked with one of several things, including another sleep problem known as narcolepsy or certain mental health conditions. A person who is sleep deprived (not getting enough sleep) may be more likely to experience sleep paralysis.

For more information on sleep and sleep problems, check out these articles:
How Much Sleep Do I Need?
Common Sleep Problems
How Can I Stop My Nightmares?

Reviewed by: Elana Pearl Ben-Joseph, MD
Date reviewed: August 2007

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Although we can't reply personally, you may see your question posted to this page in the future. If you're looking for medical advice, a diagnosis, or treatment, consult your doctor or other qualified medical professional. If this is an emergency, contact emergency services in your area.

*Names have been changed to protect user privacy.