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. Say something unreasonable


If you rarely come up with witty or funny lines,  If your words are inconsistent and unnecessary remarks frequently come out and you lose focus in the story, it may be due to lack of sleep.


. I don't feel excited.


According to a study of people who hadn't slept for nearly two days, laughing involves a complex brain process, and they found it hard to find comics or funny newspaper headlines interesting.


. Headaches often occur.


Lack of sleep causes migraines, and feeling dizzy and having headaches is a sign of sleep deprivation.


. To feel sluggish and tired


If you often feel sleepy while driving, or if your eyes get drowsy after staring at a computer screen for a long time during a long meeting, you may feel tired, but these are also caused by lack of sleep. Drinking caffeinated drinks just because you're sleepy is only temporary, but it doesn't have much effect.


. Vision deteriorates.


People who lack sleep are at about 3.2 times more likely to experience vision impairment.


. Fall asleep immediately after lying down


The U.S. National Institute of Neurological Diseases and Stroke states that if you fall into a deep sleep within five minutes as soon as you rest your head on a pillow, it means you are usually sleep-deprived.


. Always looks tired


Lack of sleep leads to dull skin, swollen and bloodshot eyes, and even though you didn't drink excessively the day before, viewers may mistakenly think you were drunk the day before.


. There are many painful and aching spots.


When you lack sleep, you become more aware of your usual pain and aching sensations, and your mood shifts to low-pressure mode, making you feel more painful. Also, inflammatory chemicals are released due to lack of sleep, which worsens the pain.