In the hot weather of summer, many people like to blow air conditioner, eat sweet food and cold food. In fact, such eating habits are often the causative factors of tumors. Cold and too sweet diet, mental factors and sitting posture are important triggers for tumors, which must be paid attention to. Tumor patients should try to eat less fruits with too much sugar It is a great protection for tumor patients to eat less food with too much sugar as much as possible. Tumor patients of abdominal cavity and pelvis must eat less fruits. It is reported abroad that sugar, tobacco and alcohol are the three major causative factors of tumor. Sugar is sweet and most of fruits are very sweet, so it is not recommended to eat more or not. Drinking fruit juice every day is not good for the body. Cold is also an important cause of tumor, which is not recognized by western medicine. Cold includes cold drinks and foods taken out of the refrigerator. Depression is one of the tumor triggers Mental factors are very important factors in causing tumors. Research shows that more than 70% of breast cancer patients have suffered from mental shock two years before they got the disease and their emotions are greatly affected; some tumor patients with intestinal diseases tend to be cautious, worrying and easily nervous. Local pressure change is also a cause of tumor. The local pressure will cause local blood flow problems, and cancer cells will easily accumulate and develop lesions, which is very common in clinical practice. Patients with metastasis in sacrococcygeal spine tend to put their feet on the coffee table, and patients with metastasis in cervical spine tend to be low-headed. The development of metastasis site of tumor has a lot to do with long-term one posture.