2. Low mood: Nobel laureate Daniel Kahneman found in his research that one of the two main factors affecting people's mood is sleep. In addition, some studies have confirmed that people who sleep well at night have a more positive mood and vice versa.
3. Headache (Neurology): Scientists have not been able to find out the reason behind headache (Neurology), but studies have found that 36% to 58% of people who do not get enough sleep wake up with a headache.
4. Weight gain: People who are sleep deprived have an imbalance of hormones in their body, an increased appetite for high-calorie foods and a reduced ability to control impulsive behavior. These factors may lead to rapid weight gain.
5. Blurred vision: The less sleep you get, the more likely you are to suffer from visual deviations, a dark field of vision, difficulty seeing, and even hallucinations.
6. Slow reaction: Lack of sleep can also make your reaction to external things become slow.
7. Slurred speech: According to research, if you don't sleep for 36 hours in a row, you are prone to repeat the same words, slow and slurred when you speak, much like the way a drunk person speaks.
8. Higher risk of car accidents: Driving with a lack of sleep is as dangerous as drunk driving.
9. Easy to get sick: When you don't get enough sleep for a long period of time, your body's immunity drops. If you are often infected with colds and flu (respiratory medicine), it is likely that lack of sleep is to blame. Studies have shown that people who sleep less than seven hours a day for two consecutive weeks have three times the risk of catching a cold (respiratory medicine) than people who sleep more than eight hours.
10. Vaccines are less effective: Vaccines administered when you are sleep-deprived are less effective because of poor immunity.
11. More afraid of pain: a number of studies have shown that if you don't get enough sleep at night, your body's sensitivity to pain will increase and your tolerance for pain will decrease.
12. Lower learning ability: Short-term memory is one of the key factors in determining learning effectiveness. People who are sleep deprived will have a weakened short-term memory capacity, which affects learning effectiveness. In addition, Italian research has confirmed that without enough sleep, it is difficult to concentrate.
13. Easily forgetful: The less sleep you get, the more likely you are to be forgetful, and in old age, the risk of developing cognitive impairment increases.
14. Doing things wrong all the time: Studies have found that a night without sleep can lead to an increase in numerical errors of 20% to 32%. Sleep-deprived people are also highly susceptible to financial losses when making investment decisions.
15. Gastrointestinal problems: U.S. research has found that sleep deprivation can easily cause inflammatory bowel disease; people with Crohn's disease (anorectal surgery, digestive internal medicine) (intestinal disorders), if sleep deprivation, the risk of recurrence will be twice as high.
16. Reduced libido: lack of sleep will reduce the body's secretion of testosterone, resulting in decreased libido.
17. High risk of diabetes (endocrinology): lack of sleep affects insulin resistance, aggravating type 2 diabetes (endocrinology); in addition, there are also studies that found that sleep deprivation has a correlation with the development of diabetes.
18. High risk of heart disease: Compared to people who sleep 8 hours a day, those who sleep only 4 hours a day will have much higher blood pressure and are more likely to suffer from heart disease.
19. Higher risk of cancer: Research on the link between sleep and cancer is still in its early stages, but the results so far show that sleep deprivation does increase the risk of cancer, especially colorectal cancer (anorectal surgery, digestive medicine, oncology) and breast cancer.
20. High risk of death: The biggest risk for people who are chronically sleep deprived is a significantly increased risk of dying within a short period of time.