It is known all over the world that you can easily get tumors when you are angry. Stanford University did a very famous experiment, take one end of the nose tube on your nose to let you breathe, and then take the other end and put it in the snow for ten minutes. If the snow and ice do not change color, it means you are at peace; if the snow and ice turn white, it means you are very guilty; if the snow and ice turn purple, it means you are very angry. Pump out 1 to 2 ml of those purple ice and snow to the mice, and the mice die after 1 to 2 minutes. So anger is very harmful to the organism, which is a great concern. The census of esophageal cancer in many provinces and cities done in China in the 1950s to 1960s showed that: before the occurrence of esophageal cancer, most patients experienced intense psychological stimulation; another survey confirmed that: unresolved grief is closely related to breast cancer; and there are also studies suggesting that at least emotional stress can enhance patients’ cancer susceptibility and can affect the evolution and prognosis of the disease. After the diagnosis of tumor, most people usually have the thought of “I have a tumor, my life is over, I don’t have many days to live”. Later, although they slowly accept the reality and start to seek medical treatment, with the prolongation of treatment time and the emergence of side effects of radiotherapy and chemotherapy, doubts and anxieties come: “How come I have not gotten better after such a long treatment, but got worse?” “I don’t have any money in my hand, and I’ve spent all the money I borrowed, so where can I borrow more?” “My family is with me every day and night, I can’t even take care of my work or home.” “The best experts in this field have not been able to cure, what should we do next?” Some are even mentally calculating the afterlife and writing wills behind the family’s back …… According to statistics, about 34% to 44% of malignant tumor patients have obvious psychological stress reactions or psychological disorders, and 18% of them meet the diagnosis of major depressive episode. Although the exact mechanism between excessive psychological burden induced by tumor patients and their poor prognosis is still unclear, a more consistent understanding is that under long-term emotional depression and mental stress condition, the central nervous and limbic systems of the brain will undergo asynchronous mechanism due to excessive tension, thus reducing the immune function of the body and weakening the role of immune system in identifying and destroying cancer cells. Our long-term clinical observation of liver cancer reveals that under similar conditions and treatment modes, two types of patients have relatively better prognosis: those who are happy-go-lucky, who do not care about the tumor and have an optimistic and positive attitude after getting sick, and are the “obvious cancer fighters” in people’s eyes; and those who are confused and do not know their own condition at all, thinking that they are just hospitalized with ordinary cancer. They think they are just having a common chronic disease. At the same time, the recurrence of cancer is also related to psychological factors. I have had several cases of liver cancer patients who have been stable for many years, but because of family changes and mental shock, they found that the cancer recurred again after a few months to half a year. Therefore, for tumor patients in recovery, they must adjust their mindset and learn to extricate themselves from the negative emotional state as soon as they have psychological stress. To sum up, from the prevention of tumor to the whole treatment and recovery process after the disease, the influence played by psychological factors cannot be ignored, and sometimes it is even irreplaceable by other treatment methods. The current consensus is that bad emotion can reduce the immune function of the body, thus weakening the role of immune system in identifying and destroying cancer cells; on the contrary, good psychological emotion can improve and balance the immune function of the body, which can not only prevent the occurrence of malignant tumor, but also make the already appeared tumor in a self-limiting state, which is ultimately beneficial to the immune function of the body in destroying it, which is the powerful role of psychological factor. material role. Therefore, it is the consensus of mankind that a good spiritual and psychological state helps to fight against malignant tumors.