Sleep inertia is a common symptom of idiopathic hypersomnia (IH). With sleep inertia, you feel very groggy and out of sorts when you wake up. It usually happens after you’ve been asleep for at least ...

Sleep inertia occurs when your body is fighting to stay asleep when you want it to wake up. It generally feels like a temporary disorientation and drop in performance or mood after you wake up. Here's ...

Called sleep inertia, it happens when you suddenly snap out of REM sleep — a deeper stage of sleep where you dream and your body repairs itself. During that sleep cycle your body is flooded with high ...

Here, sleep pros answer the big question of what is sleep inertia and how you can move past the groggy feeling with six tips. Waking up can be hard, even under the best of circumstances. But sometimes ...