Cancer is a preventable and curable disease, and the key is early detection and treatment for a good time of treatment. 90% or more of the risk of tumor development can be explained by poor lifestyle behaviors. Through health promotion and health education, changing bad habits and maintaining a healthy lifestyle are the most effective measures to prevent tumors. The potential of cancer prevention is still large. This is because among the cancer-causing factors, dietary factors account for 35% and tobacco accounts for 30%, and the sum of the two is about 65%, which far exceeds other factors such as environmental pollution and viruses. The choice of lifestyle and the change of living habits are entirely up to you. This means that the initiative of cancer prevention is in your own hands. For example, if you take certain measures to change bad habits, do not smoke, do not drink alcohol, eat foods rich in vitamin A, C and vitamin E, and eat fresh vegetables and fruits rich in vitamins, eat less pickled, smoked, burnt and moldy foods, pay attention to the diet structure and avoid obesity, then the possibility of cancer will be greatly reduced.