The key to the treatment effect of any disease is early detection, early diagnosis and early treatment, and this is especially true for cancer. Early detection, early diagnosis and early treatment are crucial in the prevention and treatment of tumors. To enhance the health care awareness of tumor prevention and treatment, we should take the initiative to understand some basic knowledge of tumor prevention and treatment, and understand the causes, early symptoms and self-examination methods of tumor, which is very important. “Only in this way can everyone have a good understanding. 2. To improve the alertness to the early signals of tumor. Not all “early signals” are predictive of tumor, but we must be alert to all early signals, this alert does not mean that people should be worried and suspicious all day long, but should be frank and objective to analyze these manifestations, do not be careless, do not be afraid, and do not delay because of busy work, but should go to hospital as soon as possible. Consult a specialist as soon as possible, and do the relevant medical examination until it is excluded. At present, there are a lot of clinical examination means, which are convenient for early detection and diagnosis of tumor. 3.We should pay attention to self-examination: each of us should have a clear understanding of the current situation of our own body, and the earliest discovery of discomfort and abnormal changes in a certain part of the body should be made by ourselves. Through meticulous, comprehensive and regular self-examination, abnormal changes in superficial or easy-to-examine parts can be found, and it is easy to catch the suspicious performance in time against the “early signal” we mentioned earlier. Facts show that, while mastering the basic knowledge of tumor prevention and control, paying attention to regular self-examination can greatly improve the early diagnosis rate of tumor. It is recommended that healthy people over 50 years old should have a regular health checkup every year. The formation to growth of tumor is a long process, and many tumors do not have any symptoms in the early stage. With the strengthening of people’s health care awareness, more and more people have discovered early tumors through health checkups, so that early treatment can be achieved and tumors can be cured. 5.Cancer has obvious family gathering phenomenon. Although cancer is not clearly hereditary, there is obvious family gathering phenomenon, mainly in the paternal line and second in the maternal line, such as esophageal cancer, stomach cancer, liver cancer, pancreatic cancer, breast cancer and intestinal cancer. Children of sick parents should take early prevention to reduce the risk of cancer. It is recommended that family members in high-risk families should have regular screening over the age of 40.