Relevant experts pointed out that people who pay attention to psychological immunity after illness can overcome the disease and recover because mental factors are closely related to immune function, and a positive mental state can enhance the body's disease resistance. Studies have shown that the nervous system can dominate immune organs through neurotransmitters such as norepinephrine and 5- hydroxytryptamine, and a positive mental state can enhance this dominance, thus increasing antibodies. In addition, it can also play a role through neuroendocrine hormones, mainly adrenocortical hormones. However, people who are mentally decadent in the disease can reduce T lymphocytes in the blood, inhibit the role of beta lymphocytes and macrophages, and lead to a decline in immune function. Facts show that in the face of disease, once the psychological defense line collapses, it will become a victim of the disease.