Decreased immunity can be regulated by strengthening exercise, improving diet and adjusting lifestyle habits. To strengthen physical exercise, more outdoor activities, such as running, tai chi, swimming, etc., can improve the body’s immunity, but to avoid overwork. In the diet should pay attention to dietary diversity, reasonable distribution of various types of food intake, such as vegetables, fruits, beans, cereals, nuts, meat, eggs and dairy products, etc., to ensure balanced nutrition, eat less greasy, spicy and other stimulating food. To develop good habits, to do regular work and rest, to ensure sufficient rest time, do not stay up late, change smoking, drinking and other bad habits. If there is any physical discomfort, you can go to the regular hospital for consultation and active treatment.