There are actually many reasons for the increasing number of cancers, which are summarized as follows I. Large fish and meat, three high dietary structure. Especially in recent years, high fat, high protein, high calorie and low dietary fiber have become the main dietary structure of the people, fried food, big fish and meat, fine food and so on have contributed to the occurrence of cancer. In addition, metabolic changes are prone to inflammatory reactions, and many pathways are the same as those leading to tumor development. Therefore, clinically, the occurrence of breast cancer, prostate cancer, bladder cancer, ovarian cancer, pancreatic cancer, kidney cancer, esophageal cancer, stomach cancer, thyroid cancer are all related to this. Smoking and drinking. Smoking and drinking are undoubtedly the “big enemies” of most cancers, and 80% of lung cancers are caused by long-term smoking. It has a direct impact on 80% of male lung cancer patients and at least 50% of female lung cancer patients worldwide. About 60 types of cigarette smoke are known carcinogens. Cigarette smoke, when inhaled into the lungs, creates a state of oxidative stress. The body’s own ability to repair such tissue, mainly by inducing stem cells to grow and divide to produce new cells to compensate for the necrotic tissue, will result in repeated “damage-repair-damage-repair” over time, which can easily lead to increased genetic mutations. In addition to directly inducing lung cancer, smoking is also associated with cancers of the esophagus, larynx, oral cavity, pharynx, kidney, bladder, pancreas, stomach, and cervix, while alcohol has long been classified by the IARC (International Agency for Research on Cancer, part of the World Health Organization) as a Group 1 carcinogen along with its primary metabolite formaldehyde, which has the highest level of evidence of carcinogenicity. “The specific mechanism by which alcohol causes cancer varies depending on the type of cancer; for example, in liver carcinogenesis, alcohol causes cirrhosis first. In the case of upper gastrointestinal tumors, it is mainly due to the conversion of ethanol to acetaldehyde in saliva, which causes the concentration of acetaldehyde in saliva to reach 10-100 times that in the blood, leading to upper gastrointestinal tract carcinogenesis.” Professor Cai said. Third, sedentary and lack of exercise. Sitting at work all day and going home in the sofa does not want to move …… Don’t think that the harm of sedentary is only to hurt the cervical vertebrae and spine, but also to increase the chance of cancer incidence, first of all, moderate exercise has a certain promotion effect on body metabolism and immunity of the body, thus reducing the risk of many kinds of cancers. Sedentary will lead to slower digestion, decomposition and excretion of fats and proteins, which will increase the risk of rectal cancer due to the prolonged stay of intestinal metabolites in the intestine, thus increasing the stimulation time of harmful substances to the intestine. In addition, lack of exercise will easily lead to obesity, which has been proven to be an important risk factor for the occurrence of many cancers, such as colorectal cancer, breast cancer, endometrial cancer, prostate cancer, thyroid cancer, esophageal cancer, kidney cancer, bladder cancer, etc. Fourth, staying up late. The American Association for Cancer Research said a long time ago that in terms of cancer incidence, women who slept <7h per night were 47% more likely to be physically active than women who slept more. Although there were no clear reports at the time on how too little sleep actually makes people more susceptible to cancer, the medical community has long linked getting enough sleep to good health. Primarily, sleep deprivation reduces the body's production of melatonin, a free radical scavenger, which makes it difficult to fight oxidative damage produced by cells, and predisposes to insulin resistance, changes that have been linked to cancer development. Sleep deprivation can also cause a decrease in the body's immunity. Animal experiments have shown that a week of complete sleep deprivation in small animals can lead to death by infection due to impaired immune function. People can also be extremely tired and sleep deprived - prone to colds. Long-term sleep deprivation leads to impaired immune function and makes cancer cells easily escape from the immune cells and become cancerous. V. Being under bad mood. Don't suppress your emotions. If you pursue perfection too much and don't give vent to your emotions, you will easily form a "cancer personality". Emotions causing cancer can be proved from the perspective of Chinese medicine. "If you dine in an unpleasant environment, your mood will be affected, which will directly affect the function of spleen and stomach, causing dysfunction of spleen and stomach, and liver qi, which will lead to qi stagnation and blood stagnation and create conditions for cancer to occur." Sixth, eating too fast, too hot and too full. In addition to unreasonable diet structure will lead to cancer, wrong eating habits will also increase the chance of cancer. There are three most common ones at the table: eating too fast, eating too hot, and eating too full. Eating too much and too fast will cause the human digestive system to flocculate, thus causing irregular secretion of gastric acid, which will lead to superficial gastritis and peptic ulcer, thus inducing gastric cancer; in addition, eating too much and too fast will cause abnormal secretion of bile, which will lead to liver damage and dysfunction, thus laying a hidden danger for the occurrence of liver cancer, while eating too hot will easily cause scalding to the mucous membrane of the mouth or esophagus, which will lead to the development of esophageal epithelium in the long run. The esophageal intestinal epithelial metaplasia, which is a precancerous lesion.