Different psychology can cause cancer, cure cancer and prevent cancer. Scientific research shows that apart from the relationship between environmental factors and cancer, there is also a close relationship between psychological factors and cancer. That is to say, different psychological factors can cause, cure and prevent cancer. 1. Psychological cancer-causing: In the process of fighting with cancer, human beings found that depression, sadness, tension, stress and heavy mental pressure can be the causative factors of cancer. The ancient Greek doctor Jalen observed a large number of cases and noticed that depressed women were more likely to get cancer than cheerful and lively women. Another reputable physician, Dr. Paget, also believed that cancer tends to enter the body after a period of worrying and pessimism. A large number of epidemiological surveys and studies have confirmed that cancer is related to the inner impulses of patients. Long-term excessive tension and anxiety stimulate the central nervous system, which can lead to the dysregulation of excitation and inhibition in the brain and the weakening of the autoimmune system to suppress cancer, thus causing certain cells in the body to become cancerous. In the 1950’s, Lawrence K. H. H., a psychologist, conducted a study on a group of cancer patients. In the 1950’s, Lawrence C. Cuisinart psychologist investigated the life history of a group of cancer patients and found that most of them had psychological scars of different degrees since childhood. For example, they lost their parents in early childhood, lost their love in youth, lost their spouses in middle age, and lost their children in adulthood. These people have suffered blows in life and become silent, lonely, lose confidence in life, lack of enthusiasm for work, no friendship with colleagues, the whole life immersed in loneliness and pain. Dr. Baltrusch, a scientist from West Germany, came to a similar conclusion after a survey of 8,000 cancer patients. Most of these 8,000 patients had clinical manifestations of their malignancies that occurred at times involving disappointment, loneliness and other heavy blows and mental stress that occurred frequently. A British doctor reportedly conducted a comprehensive survey of 250 cancer patients and found that more than two-thirds had suffered a mental shock prior to the onset of cancer. Dr. Benson in the United States believes that a person’s daily exposure to a highly stressful environment can cause a rapid increase in the concentration of cortisol in the blood, leading to the destruction of T, B lymphocytes and other immune components in the immune organs and the failure to eliminate mutated cells in the body in a timely manner, so the possibility of developing cancer increases significantly. Some scholars have collected data for nearly 50 years and found that most of the emotional changes of depression, anxiety, disappointment and difficulty in relieving oneself are 1 to 2 years before cancer. ”Cancer personality” and cancer, the so-called “cancer personality” was first proposed by psychologists. People with “cancer personality” have special behaviors and behaviors, especially psychologically, they have special appearance. For example, they do not care about anything since childhood, they are lonely and introverted, they do not get close to friends, relatives or parents, and when they become adults, they are attached to one person or their own occupation, and they devote their energy to their spouse, children and work, once they are frustrated, such people are usually prone to cancer within two years. 2.Psychological cancer treatment: Just as abnormal psychology is a prerequisite for cancer, a healthy and fulfilling psychology is also an important condition for winning cancer. Many facts prove that a person who is determined to overcome cancer has more chances to survive and prolong his life. Many cancer patients, once they are informed that they are terminally ill, will not think about eating and drinking and will be pessimistic and disappointed. In fact, the doctor should let the patient understand that his immune system still exists and is still fighting against cancer, but the key is that the patient needs to adjust properly, cooperate with the treatment and give full play to the body’s immune function. An Air Force hospital in the United States treated a 61-year-old patient with laryngeal cancer, who actively cooperated with his doctors despite the fact that he could hardly even swallow his saliva. Especially when he saw how the white blood cells attacked the cancer cells and finally destroyed them all, he was more confident to overcome the cancer. Two weeks later, the patient’s lump shrunk significantly, and his weight gradually recovered, and finally, he recovered his health completely. Of course, in the face of life-threatening cancer, it is difficult to build up enough confidence and maintain an extraordinary calmness. However, experienced oncologists believe that some tumors are originally fatal, but it is because patients treat cancer with healthy psychology and overcome the disease with tenacity that they can survive and prolong their lives. As early as 1918, some foreigners collected data on 302 cases of cancer self-healing all over the world, which were confirmed by pathological sections. In the past 30 years, there have been many reports of cancer self-healing around the world. Recently, statistics from the American Cancer Society show that about 1 in 10 cancer patients may heal themselves, not because of direct killing of cancer cells, but mainly because of a change in the patient’s internal environment and increased immunity. This ability may prevent the growth of cancer cells, gradually replace them by normal cells, or create an unadaptable state in which cancer cells are transformed into normal cells. Experts believe that people who are depressed and sullen have their immunity significantly reduced through complex neurohumoral regulation mechanism, thus contributing to the deterioration of cancer, while people who are optimistic and cheerful have their immunity exponentially increased, and the growth of cancer is inhibited. This shows that spiritual factors have a very close relationship with the self-healing of cancer. 3.Psychological cancer prevention: After understanding the fact that abnormal psychology can lead to the occurrence of cancer and help the symptoms of cancer to develop in a serious direction, people realize that it is indispensable to reduce the occurrence of cancer and extend life by putting optimistic emotions and healthy psychology into life. In fact, life’s shocks and emotional changes happen all the time. The key to the problem is how to treat and how to deal with it and avoid it all. First of all, one should try to reduce the tension and pressure in daily life. Work and life to achieve a plan, regular, appropriate rest and recreation help to relieve the mood of tension. Modern people should develop a variety of hobbies and interests, which can cultivate the temperament, intended for mental health. Short trips and vacations are good for forgetting the worries and sorrows of working life. Secondly, we should deal with all kinds of sudden blows calmly, we should be good to people, unite with colleagues, do things fairly, contact the surrounding people sincerely, so that after you encounter setbacks there will be many people to help you. In addition, common beliefs and the pursuit of ideals often provide us with a way to communicate our feelings and get rid of disappointment, and with the quality of civilization, even in the face of difficulties and setbacks will make people more resilient, cultivate a healthy psychology, prevent the occurrence of cancer, and live a happy old age.