Prevention is very important. The pathogenesis of cancer comes from external and internal factors. Externally, all long-term chemical, physical, biological and other aspects of pollution and bad stimulation can become the pathogenic factors leading to cancer. In the human body, some chronic diseases (such as ulcers, inflammation, etc. ), incorrect living habits and bad habits, as well as long-term depression or anxiety will also lead to the decline of their own disease resistance, thus providing convenient conditions for the occurrence of cancer. If both internal and external factors exist for a long time, the probability of cancer will be higher.

Doing a good job in the primary prevention of cancer, establishing the necessary awareness of health and cancer prevention in daily life and work, staying away from all kinds of pollution and stimulation, forming good living habits and maintaining a positive and optimistic attitude towards life should be able to significantly reduce the incidence of cancer and achieve the goal of nip in the bud. However, for some high-risk groups of cancer, such as those who have been in close contact with carcinogenic chemical products for a long time, have poor control of their own hepatitis B and Helicobacter pylori, live in areas with high incidence of cancer, have long-term hobbies of smoking and drinking, and have long-term poor mental and psychological state, it is best to seek some medical help as much as possible in addition to doing preventive work for ordinary people.