Health includes not only physical health, but also physical and mental health. Usually, young people give the impression of being “strong and energetic”, but nowadays, young people are showing the phenomenon of “cancer-ridden and fragile”! This is a question worth thinking about. How to maintain a healthy body? 1. Regular work and rest habits The major organs of the human body must get reasonable rest after a day’s consumption in order to recover. The reversal of the biological clock will only leave an indelible mark on the body. Should abandon the practice of reversing the day and night, to develop regular habits of rest and relaxation. 2.Balanced diet The youthfulness of colorectal cancer is inextricably related to its eating habits. Young people prefer barbecue, pickled, high-fat and high-calorie foods, and less intake of vegetables, fruits and coarse grains; imbalanced eating habits will easily lead to gastrointestinal tract disorders and increase the risk of cancer. In addition, young people pursue a fast-paced lifestyle and usually take out meals instead. However, “take-out” itself lacks balanced nutrition, “toxic rice” and “gutter oil” exist together, and bacteria can easily grow during the delivery process, etc. Many undesirable factors are combined in one. The long-term consumption of food, only a hundred harm but no benefit. 3, appropriate physical exercise First of all, it is clear that money can not be exchanged for health, excessive consumption of the body, only in return for regret. In addition to “keep your mouth shut”, young people also need to “open your legs” and participate in outdoor sports and physical exercise to strengthen their body and mind. 4.Regular physical examination Cancer does not appear overnight, there is a process for its development. For example, the course of polyp developing into cancer is: normal mucosa – small polyp – large polyp – high grade endomorphism – -Pre-cancerous lesions – cancer; this process usually takes 5-15 years (but there are individual differences). Regular medical checkups are a good way to intervene in the development of the disease and prevent its derivation at the source. However, many young people do not think that they are suffering from small symptoms, and they delay and carry the disease as long as they can, and take drugs on their own; as a result, when they are found to have cancer, most of them are in advanced stage and lose the best treatment time. 5.Positive attitude towards life According to the research of Chinese scholars, 81.2% of cancer patients experienced negative life events before the disease, and 66.9% of cancer patients had negative emotions before the disease, among which depression accounted for 70.7% and anxiety accounted for 92.3%. This data alerts us that negative emotions are prone to induce cancer. Therefore, we should maintain a positive and optimistic attitude in life and laugh at life. 2. How to maintain physical and mental health? Parents should not be overprotective, but should let children experience more trials of life and give them reasonable guidance when necessary. 2, parents are busy with life, work, lack of attention to teenagers’ emotions, lack of reasonable communication, children do wrong things only blame; over time, emotional repression, pessimistic emotions can not vent, easy to form a depressed, negative and pessimistic personality; should be more with children, so that adolescents are good at expressing their inner thoughts. 3, as a teenager, facing the pressure of life, should hold a positive and optimistic attitude towards life; reasonable venting of emotions, avoid excessive suppression of emotions; more participation in collective activities, more communication with elders, more reference to the experience of seniors, from the practice of physical and mental training.