1.In the same part of the body, especially with warts and moles, repeated exposure to radiation, chemicals or burning sunlight, the possibility of skin tumors is higher. 2.Patients with long untreated gastric ulcer, lack of gastric acid secretion, chronic atrophic gastritis and multiple gastric polyps are more likely to have stomach tumor. 3.One third of oral mucous membrane leukoplakia has the possibility of tumor, and about half of vaginal tumors come from vaginal mucous membrane leukoplakia. 4.Patients with liver cirrhosis and hepatitis B disease are often prone to change into liver tumor. 5.Patients who have abortions treated with ethylene oestrol hormone have more chances of having vaginal gland tumors afterwards. 6.Patients with colon polyps, long-standing anal fistula and schistosomiasis granuloma have a greater chance of developing colorectal tumors. 7. Patients with chronic cholecystitis or gallstone disease are more likely to have gallbladder tumor. (8) The incidence of breast tumor and cervical cancer is higher in women who are obese or have their first child at an advanced age or who are unmarried and infertile. (9) Women with premature birth, multiple births, postpartum cervical tears, unclean sex life and cervical erosion have a higher chance of developing uterine tumors and cervical cancer. (10) Men who have long foreskin and do not pay attention to the cleanliness of the penis are more likely to suffer from penile tumor; and their wives are also prone to cervical cancer as a result. 11.The incidence of nasopharyngeal cancer is significantly higher in people who live in the southern region and are EBV positive. 12.People with cryptorchidism or incomplete testicular descent are prone to testicular tumor. 13.Smoking and alcohol consumption lead to significantly higher incidence of lung cancer and liver cancer The above mentioned are the risk factors affirmed by scholars at home and abroad, things are not absolute. For example, smoking is clearly related to lung cancer, however, according to the investigation of relevant departments, there are not many Chinese women who smoke, but there are quite a lot of people who suffer from lung tumor, what is the reason? This may be related to the special cooking habits of Chinese women. Many women cook for years and use high fire to stir-fry vegetables, which makes vegetable oil decompose and produce some harmful substances, and then volatilize and let people inhale into their lungs, which is harmful to human body. Women’s long-term exposure to the harmful gases from these oils and fats increases the likelihood of lung cancer. As we all know, tumor is the result of genetic mutation of tissue cells under the action of certain factors, and loss of normal growth characteristics, while kitchen fumes can lead to genetic mutation of cells. Therefore, the formation of tumor is the result of a combination of multiple factors. We have to bravely meet it and at the same time pay attention to many factors both internal and external to different diseases. The 21st century is the era of our eradication of tumor, just like lobar pneumonia, smallpox and syphilis.