As a doctor, I come into contact with patients with different diseases every day, and every time a patient is asking: Doctor, why do I have this disease? When will I be cured? When can I stop taking medicine? In the face of patients’ questions, looking at a pair of innocent eyes, I deeply feel the impermanence of life, the fragility of human nature, the incompetence of modern medicine, the reason why people are sick, but the following four factors: 1, genetic genes, modern medicine has proved that many diseases are susceptible to genes, such as leukemia, autoimmune diseases, cardiovascular disease, etc., many young people, even infants and children may suffer from a disease, each kind of Each disease can affect her whole life. Most rheumatic immune diseases require lifelong medication, for which modern medicine is pale, no one can guarantee that you will not have SLE, and no one can guarantee that you will not have rheumatoid arthritis; 2, environmental factors, environmental factors are divided into natural and human environment, many diseases are related to the living environment, common occupational diseases, such as silicosis, and now the haze can lead to many diseases. And now the haze can lead to many respiratory diseases, and the human environment can also lead to many diseases, you live in a disharmonious human environment, directly affecting your emotions, leading to endocrine disorders, hormone metabolism disorders in the body and disease; 3, personality and lifestyle habits, irritable people are prone to hypertension and cardiovascular disease, depressed people are prone to stomach ulcers and cancer, people who like Smokers are prone to chronic obstructive pulmonary disease, cardiovascular disease and osteoporosis, etc. People who like to drink are prone to alcoholic cirrhosis; 4, infection factors, many diseases related to infection, such as pneumonia, reactive arthritis, rheumatic fever, AIDS, etc. Many infectious diseases can be prevented and cured, can be vaccinated to prevent, use antibiotics and other cures. To sum up, we can improve our living environment, change our bad habits to minimize the occurrence of diseases, for genetic susceptibility factors, although we can not change, we can change our mindset to happily receive the “gift” of God, and live in harmony with it.