Should I go back to sleep if I wake up tired?
Should I go back to sleep if I wake up tired? “You wake up feeling kind of groggy, like you have a dull headache, maybe a bit of nausea, and lethargy—you just don't feel like doing anything.” Your best bet is to resist the urge to nod back off after you wake up. But if the lure of your bed is just too strong, you can make a slight compromise.
How long does it take to hallucinate from lack of sleep?
asleep: With total sleep deprivation, meaning someone hasn't slept at all overnight, hallucinations can start to occur after 24 hours but become more likely when a person is awake for 36 to 48 hours straight.