(CNN) -- If you have a smartphone, you may have felt the embarrassment of sending a private message to the wrong person or having autocorrect fail you at just the wrong time.
But some people experience a different kind of messaging mishap, one they may not even remember doing. And no, they're not drunk-dialing.
They're sleep-texting.
While hard data is lacking on this cultural trend, the anecdotal evidence has been mounting over the past few years. Twitter users regularly recount the loopy messages they've sent with the hashtag #sleeptexting. "There are texts sent from my phone at 5am that I do not recall sending," said one tweet. Another said, "I should stop sleeping next to my phone."
Others post Twitpics and Instagram photos showing their bizarre or garbled messages, some of which are more gibberish than actual words. One woman told CNN affiliate WQAD last year that she had a sleep-texting disorder.
Whereas some people might "get up and go get something out of the refrigerator" while in a state of sleep, said Dr. Jim Fulop, the corporate medical director for OhioHealth Sleep Services, others "grab their smartphone, which is right next to them, and they may text or do other things."
The idea of unlocking a smartphone, opening a texting app and then typing something while asleep may sound far-fetched, but the "sleep-texting" term is a little misleading. It's more like "half-asleep" texting, as doctors describe it as a state of rest where a person isn't fully awake.
"It's like your brain is on autopilot," explained Dr. Shelby Harris, director of behavioral sleep medicine at Montefiore Medical Center in New York. "Think about the rate at which people are texting nowadays, and most people sleep right next to (their phones), so if they wake up it's another automatic behavior. ... This is sort of a form of sleepwalking, that's kind of the way that I look at it."
Unlike sleepwalking, which can be dangerous, sleep-texting tends to be a habit that can be easily laughed off.
more