Long-term continuous exposure to artificial light, coupled with mental stress, will interfere with the secretion of hormones in the human body, thus inhibiting the secretion of melatonin by the pineal gland of the brain and increasing the probability of cancer. At night, the yang is weak and the yin is cold. If you stay up late for a long time and don't pay attention to cold protection at night, it will increase the internal cold in the body, leading to blood deficiency inducing breast cancer.

Second, increase the risk of gastric cancer.

The human gastrointestinal tract also needs rest to achieve self-maintenance. Staying up late will greatly reduce the effect of gastrointestinal rest, affect the ability of gastrointestinal repair and protection, and weaken gastrointestinal function. In the long run, gastritis, gastric ulcer, gastric cancer and other diseases will follow. In addition, some people are used to eating late at night, which will increase the burden on the stomach and lead to stomach problems.

Third, it is easy to be sad.

Sleep is closely related to arrhythmia, sick sinus syndrome, angina pectoris, heart failure and cardiogenic asthma. During 4:00-7:00 in the morning, the excitability of human sympathetic nerve increases and cardiovascular activity is unstable. If you don't rest at this time, it is more likely to lead to myocardial ischemia, hypoxia, sudden angina pectoris and myocardial infarction.

Fourth, reduce immunity.

The rhythm of human physiological response is consistent with the alternation of day and night. Once this rhythm is destroyed, the disease resistance of human immune system will be reduced. 165438+ 0: 00 pm to 3: 00 am is the best stage for the liver to play its role in storing blood and detoxifying. This period of time can not guarantee to rest on time, which will damage liver qi and reduce resistance and immunity over time. Therefore, people who maintain health and nourish the liver must sleep before 1 1 at night, which is conducive to blood returning to the liver to detoxify.

Five, easy to get fat

The more calories people eat, the more likely they are to get fat. People who sleep less than 6.5 hours a day are more likely to be obese. Lack of sleep will make the human body secrete more "hunger hormones", which will make people overeat and lead to obesity. Human adrenocortical hormone and growth hormone are secreted at night. Often staying up late can also lead to endocrine disorders, thus forming endocrine disorders and obesity.

Extended data:

Precautions for staying up late? ：

1, go to sleep first

If you are too tired to stay up late, even drinking coffee at this time will not achieve the refreshing effect. You can have a quiet sleep. Although this is a passive remedy and a last resort, you must rest and sleep properly after staying up late.

2. Drink plenty of boiled water

Water is the most needed substance for human body. People who often stay up late must get into the habit of drinking water regularly, and it is advisable to drink 4-6 glasses of water every day. Thirst is a signal that the human body is short of water, indicating that the cells in the body are dehydrated. If left unchecked, it will affect health.

3. Eat like this when eating midnight snack.

I feel hungry when I stay up late. At this time, you should choose a small amount of starch and eat until you are five points full. Excessive starch intake will increase the burden on the digestive system and make people feel sleepy; But the amount of starch can also boost the spirit and provide energy to the brain, so it is very important to master the amount. A small amount of starch can be mixed with protein, such as soybean milk and milk, which can satisfy hunger and bring vitality.

People's Daily Online-Experts Interpret Ten Harms of Staying Up Late

People's Daily Online-How to restore energy if you often stay up late?