Nowadays, modern scientific research shows that there is a close internal relationship between people's mental psychology and physiology. A good mental state can make the physiological function in the best state. On the contrary, anger, anxiety, sadness, resentment, fear and other negative emotions can easily induce many diseases, including cancer. Any kind of emotional change will lead to a series of changes in cells, blood vessels, muscles, viscera, endocrine and immune functions, leading to visceral dysfunction. Clinical statistics show that more than 90% of diseases are directly or indirectly related to bad emotions. Bad mood hinders the production of macrophages, lymphocytes and immune antibodies, leading to immune deficiency, which leads to the occurrence and aggravation of various diseases and cancers. Bad mood is more harmful to elderly patients with cardiovascular diseases. Someone studied 277 patients with myocardial infarction and found that 65% of them had bad mood before the onset. The researchers also observed that the incidence of heart disease in middle-aged and elderly people with large fluctuations in bad mood is more than six times higher than that in middle-aged and elderly people who are calm when things happen. The reason is that bad emotions can make sympathetic nerves excited, and release a large number of bioactive substances such as norepinephrine and epinephrine in the body, which can accelerate metabolism, increase the amount of hypoxia in the heart, increase the burden on the heart, lead to coronary artery spasm, myocardial ischemia and hypoxia, and then lead to cardiovascular diseases such as arrhythmia, angina pectoris and myocardial infarction. The influence of bad emotions on the body, from appetite to sleep, from breathing to blood pressure, involves almost all systems of the whole body. Modern medicine believes that diseases directly related to emotions include hypertension, coronary heart disease, bronchial asthma, atopic enteritis, diabetes, autonomic nervous dysfunction, malignant tumors and so on. Bad emotions have a particularly serious impact on women's physical and mental health. Modern medical research has confirmed that heavy psychological blow, frequent and intense stimulation, fluctuating emotions and so on. Will lead to female nervous system damage, lead to premature aging, lead to high blood pressure, early menopause and so on. Being in a bad mood is also the natural enemy of beauty, which can cause vasospasm, destroy nutritional fiber, wrinkle the skin prematurely, oppress sweat glands and sebaceous glands, and lead to dry skin with gray-green complexion. Not only that, emotions have an impact on menstruation and the fetus in the pregnant woman's stomach: menstrual cramps are often irritable, and bad mood will in turn cause irregular menstruation or other gynecological diseases; Pregnant women's emotional irritability will increase the frequency and intensity of fetal movement several times, even for several hours; If pregnant women fidget for several weeks, it will affect the whole period of the fetus in the mother's body, and even cause some congenital physical defects. For people who have suffered from a certain disease, if they don't know how to adjust their emotions, they will further aggravate their physiological dysfunction, reduce their resistance to the disease and accelerate the further deterioration of the original disease.