Why does falling asleep and waking up in the middle of the daytime feel so weird

I just got up from a 4 hour nap that I took at like 3 o clock, and I’m sweating and my socks are off and my bed is messy like everything feels weird bro

Your body builds up adenosine, a chemical that accumulates in your system to cause sleepiness, as the day progresses, says Siebern.

This state is known as ‘sleep inertia’, and it’s more likely to happen when we nap for longer than 20 minutes. It’s not known exactly what causes sleep inertia, but it may involve a molecule called adenosine, which builds up in our brain during waking hours, and decreases during sleep.

Another common experience while falling asleep is a hypnic jerk, or sleep start. As you are drifting off, you may be aware of a sensation of falling, or you may feel like you are dreaming about falling. Your body may suddenly jerk you awake. These sleep starts are most likely harmless.

After awakening from a nap or a long sleep episode (for example, 7 to 8 hours of sleep at night), people tend to feel groggy from sleep inertia. Sleep inertia is a temporary disorientation and decline in performance and/or mood after awakening from sleep

This state is known as ‘sleep inertia’, and it’s more likely to happen when we nap for longer than 20 minutes. It’s not known exactly what causes sleep inertia, but it may involve a molecule called adenosine, which builds up in our brain during waking hours, and decreases during sleep.

Sleep inertia is the feeling of grogginess, disorientation, drowsiness, and cognitive impairment that immediately follows waking. View Source . The biological reason for sleep inertia is unknown. However, researchers hypothesize that sleep inertia is a protective mechanism.