Insufficient sleep can directly affect how a person feels during their waking hours. Examples of these symptoms include:
Slowed thinking
Reduced attention span
Worsened memory
Poor or risky decision-making
Lack of energy
Mood changes6 including feelings of stress, anxiety, or irritability
A person’s symptoms can depend on the extent of their sleep deprivation and whether it is acute or chronic. Research also suggests that some individuals are more likely to experience symptoms after a lack of sleep and that this may be tied to a person’s genetics7. Stimulants like caffeine can also mask the symptoms of sleep deprivation, so it’s important to note how you feel on and off these substances.
they generally don't know what's going on, and half of the time they don't know what's wrong with them and once they do know what's wrong, they don't even know what to do to treat it.
