People with catathrenia groan in their sleep. It’s a rare condition that’s classified as a sleep-related breathing disorder, similar to obstructive sleep apnea (OSA), though it isn’t usually as ...

There’s a long list of weird things that can happen when you sleep—think sleepwalking, sleep sex, or even waking up unable to move your body. But as for the noises you make, those are pretty normal, ...

Catathrenia often causes daytime fatigue and embarrassment from the groaning. Nocturnal groaning usually occurs during REM sleep, likely due to vocal cord vibrations. Sleeping with a white noise ...