Occasional lack of sleep of 7 hours generally does not increase the probability of cancer, but long-term sleep of less than 7 hours may lead to a decline in resistance, thus increasing the probability of cancer. Sleep can improve the immune function of the organism, enhance the ability to resist diseases, and is conducive to the improvement and recovery of diseases. Long-term sleep deprivation of 7 hours will cause damage to the organism, and may also increase the incidence of gastrointestinal diseases, diabetes and other diseases, which will have a negative impact on daily work and life.1, cancer: cancer triggering factors often include heredity, disease and bad lifestyle habits, etc. There are certain proto-cancer genes in the human body. There are certain proto-oncogenes and anti-cancer genes in the human body, and when the internal environment is stable, it generally does not cause cancer. However, when people’s lifestyle changes, such as long-term sleep less than 7 hours, the body will be in a state of overwork and mental tension for a long time, leading to immune dysfunction, reduced immunity, resulting in a decline in the body’s ability to repair DNA, leading to the activation of proto-oncogenes or loss of anti-oncogenes, the probability of cancer will be significantly higher. protein called Trifoliolate Factor 2 (TFF2), which has a certain restorative effect. If sleep is less than 7 hours, it may affect the production of TFF2, thus increasing the probability of gastrointestinal diseases such as gastric ulcers. In addition, sleeping less than 7 hours for a long period of time will cause loss of sensitivity to insulin, which may cause diabetes, obesity and other diseases. In addition to this, it will also make people feel fatigued and bored, and it is not easy to maintain concentration and a sense of happiness, which will have a negative impact on daily work and life. Therefore, it is recommended to combine work and rest in daily life, ensure high quality sleep, try not to stay up late, develop good sleeping habits, and not to smoke, drink strong tea or coffee before going to bed. Master the correct sleep posture, try to lie on the side or back. Adjust your body to the most relaxed state before going to bed, and at the same time create a good sleep environment, such as reducing noise interference, maintaining the appropriate temperature indoors, and avoiding bright light exposure. If sleep disorder occurs, seek medical help if necessary.