Tumors occur when cells and tissues grow abnormally, they have no function in the body and often interfere with normal body functions. Tumors can be classified as benign or malignant. Benign tumors can appear anywhere, but they do not spread and usually do not recur after removal. Although a benign tumor grows only in a fixed location, it should usually be removed because not only does it sometimes compress nearby organs, but a few benign tumors can later become malignant. In contrast to benign tumors, malignant tumors can spread to other sites and may still recur even after removal. Malignant tumors should be treated as early as possible. The formation of tumors seems to be related to two major factors: environment and diet. When patients change their diets and take vitamin and mineral supplements, some people’s tumors become smaller or even disappear. This is because proper diet can strengthen the immune system and thus inhibit the growth of tumors.1. Develop good habits, quit smoking and limit alcohol: The World Health Organization predicts that if people all stop smoking, cancer in the world will be reduced by 1/3 after 5 years.2. Secondly, do not abuse alcohol. 2. Food: do not eat too much salty and spicy food, do not eat food that is too hot, too cold, expired or spoiled; eat cancer prevention food and alkaline food with high alkaline content as appropriate for the old and weak or those with certain disease genes, and keep a good mental state. 3. Have a good attitude to cope with stress, combine work and rest, don’t be overly tired: stress is an important cause of cancer. According to Chinese medicine, stress leads to overwork and physical deficiency, thus causing a decrease in immune function and endocrine disorders, and stress can also lead to mental tension causing qi stagnation and blood stagnation and internal trapping of toxic fire. 4.Physical exercise: strengthen physical exercise, enhance physical fitness, improve cold tolerance and body resistance. Insist on washing your face with cold water in winter, wash your hands, massage your feet and hands before going to bed, all have some help. 5. Regular life: people with irregular living habits, such as singing karaoke all night, playing mahjong, staying out all night and other irregular life, will aggravate the acidification of the body. It is easy to develop cancer. You should develop good living habits so as to maintain alkaline physique and keep various cancer diseases away from you. 6. Do not eat contaminated food: such as contaminated water, crops, poultry, fish and eggs, moldy food, etc. Eat some green and organic food to prevent diseases from entering through the mouth.