With the improvement of people’s living standard, the acceleration of life rhythm, the pollution of diet structure and living environment, the incidence of tumor has increased significantly. According to statistics: cancer death in some large and medium-sized cities in China has occupied the first place of all causes of death. Therefore, the early detection and prevention of malignant tumors are especially important. If cancer can be detected and diagnosed early, most patients can have a good prognosis and even achieve a cure. The International Union Against Cancer believes that 1/3 of malignant tumors can be prevented, 1/3 of malignant tumors can be cured if diagnosed early, and 1/3 of malignant tumors can reduce pain and prolong life. Early stage of cancer often has no special manifestation or even no self-symptoms. Patients will not take the initiative to go to the hospital for examination, and once the state is obvious, it is often too late. In fact, some symptoms and signs may be related to early cancer, which can be called “early signs” or “warnings”. In addition to screening by medical personnel, early detection of cancer also depends on patients’ vigilance and learning to self-examine and self-discovery. The following are the early symptoms and prevention of several common malignant tumors in life: 1.Esophageal cancer: Early symptoms: difficulty in swallowing, sluggishness, stagnation or slight choking sensation in swallowing food, which may subside by itself but may appear again after several days, recurring and gradually aggravated. In the early stage, there may be intermittent discomfort, burning, rubbing or foreign body sensation behind the sternum, which can be diagnosed at an early stage if timely consultation can be made. 2.Gastric cancer: (1)Early symptoms: sudden appearance of unexplained indigestion symptoms, which are relatively stubborn and fast progressing; prominent manifestations are rapid decrease in appetite, abdominal fullness and discomfort after eating, and at the same time, significant weight loss. Alternatively, people who did not have stomach pain (“heartburn”) in the past suddenly develop recurrent stomach pain; although they had stomach pain in the past, the intensity, nature, and duration of episodes of pain have suddenly changed recently, and drugs that were effective in treatment have become ineffective or poor. (2) Prevention: the development of gastric cancer is related to dietary factors; eating sauerkraut and kimchi is easy to form nitrite; the reduction of gastric acid is conducive to bacterial growth, which increases nitrite; food contaminated by fungi or smoked or fried food can lead to cancer; therefore, the prevention of gastric cancer must avoid eating pickled food (such as pickles, kimchi, sauerkraut, etc.); prohibit smoking; thoroughly treat precancerous lesions such as gastric ulcer, atrophic gastritis, gastric polyps, etc; Treatment of Helicobacter pylori infection; change of bad eating habits such as hot food, fast food, irregular meals, etc., more garlic plants, foods rich in vitamin C, vitamin E and carotene can effectively prevent the occurrence of gastric cancer. 3.Colorectal cancer: (1)Early symptoms: sudden change of stool nature (change to mucus stool, pus-blood stool or blood stool), change of stool shape (change to flat strip, groove or groove in the middle), change of stool habit (change to multiple times a day, etc.); or accompanied by anal drop, blood in stool, followed by anemia, fatigue and weakness, and lumps felt in the abdomen, the possibility of colorectal cancer should be considered. Among them, limited and intermittent hidden pain along the colonic area is the first alarm signal of colon cancer. The obvious feeling of falling with blood in the stool is a signal of rectal cancer (colon cancer includes colon cancer and rectal cancer). (2) Prevention: The incidence of colorectal cancer has a high incidence area, mainly in the southeast coastal region of China, which is closely related to the environment, living habits and diet, such as high fat content in the diet, low fiber content, and lack of certain trace elements such as molybdenum, etc. Therefore, prevention requires keeping the stool open, eating more fiber-rich food, actively treating precancerous lesions such as ulcerative colon and proctitis and intestinal polyps, and at least twice a week At least twice coarse grains. Astragalus 10 grams, half astragalus 5 grams, drink tea for one month every spring and autumn, can effectively prevent the occurrence of colorectal cancer. 4.Liver cancer: (1) Early symptoms: Early liver cancer has no specific symptoms, if any, they are mostly some complex manifestations of pre-cancerous diseases. However, patients with chronic hepatitis or cirrhosis should be highly alert if they have stabbing pain or increased pain in the right upper abdomen or liver area, physical discomfort, loss of appetite, progressive dyspepsia, accompanied by stubborn diarrhea and significant weight loss. (2) Prevention: First, to prevent hepatitis, we also need to pay attention to the control of its transmission channels, such as diet, surgery, blood transfusion, injection, acupuncture and haircut, etc. Actively treat cirrhosis, hepatitis, especially hepatitis B. Second, forbid eating moldy foods such as peanuts, cereals, ginger, etc., which are rich in aflatoxin, which can lead to the occurrence of liver cancer, and free rice. One of the causes of liver cancer is caused by viruses, to prevent hepatitis B virus, we also need to start from dietary hygiene and living habits. Wash your hands regularly. Third, the drinking water hygiene do not pollute, there are chemicals drinking water is easy to let people grow cancer four is appropriate selenium supplementation. For people with low selenium use selenium-rich yeast, selenium polysaccharide, selenium-rich salt to supplement selenium and improve blood selenium levels. Five is to reduce nitrosamine intake as well as quit smoking and alcohol. Smoking and drinking are also bad for fatty liver, which can easily cause alcoholic cirrhosis, and part of the cirrhosis will be transformed into liver cancer. 5.Nasopharyngeal cancer: (1) Early symptoms: early signs of nasopharyngeal cancer have a common feature that the symptoms (and signs) mostly occur unilaterally. Unilateral snot and blood (meaning blowing out), unilateral nosebleed, unilateral tinnitus, unilateral hearing loss, unilateral headache, and unilateral cervical lymph node enlargement. (2) Prevention: There are obvious racial susceptibility, regional aggregation and family tendency in the development of nasopharyngeal cancer. At present, there is also a factor of its incidence said to be the infection of EBV, less consumption of dry and fresh aquatic products to reduce the occurrence of nasopharyngeal carcinoma. 6.Lung cancer: (1) Early symptoms: cough is the early symptom of lung cancer, which is characterized by paroxysmal irritating choking cough with the feeling of coughing up, generally no sputum or only a small amount of white foamy sputum, and yellow sputum may appear secondary to infection. If there is no improvement after 2 weeks of anti-inflammatory treatment, the possibility of lung cancer should be alerted. Or if the nature of cough changes on top of the existing chronic cough, even accompanied by “bronchial tinnitus” and “shortness of breath”, it should be noted. Another warning sign of lung cancer is intermittent recurrent small amount of bloody sputum or sputum with blood in it. In addition, symptoms such as chest and back pain, chest tightness and fever may also appear. (2) Prevention: No smoking, stay away from dust pollution, and actively treat tuberculosis. Every year after autumn, “15 grams of lily, 15 grams of silver fungus and 15 grams of maitake” can be boiled in water or made into porridge, which can play a role in fighting cancer and moistening the lungs. Breast cancer: (1) Early symptoms: breast lumps, skin dimpling (orange peel-like changes or “dimple sign”), nipple deformation, retraction or overflow (non-lactating women suddenly have unilateral nipple flowing like milk-like, blood-like or water-like liquid). (2) Prevention: According to an 8-year survey conducted by Harvard University, if women do not consume enough vitamin A, their chances of developing breast cancer increase by 20%. If women can regularly consume foods containing vitamin A, such as carrots, potatoes, lentils, pumpkin, tomatoes, garlic, asparagus, celery, spinach, egg yolk, lamb liver, apricots, lemons, wheat germ, vegetable oil, etc., they can effectively prevent breast cancer. Experts believe that women who can adhere to the right amount of vitamin A intake every day will have a 40% lower chance of breast cancer after six months. Some breast cancers come from malignant changes such as breast enlargement and fibroadenoma. Active treatment of the above diseases can effectively prevent breast cancer. In addition, maintaining a good mood is also one of the ways to prevent breast cancer, usually eating more cabbage, cauliflower, cauliflower and other liver-clearing products. The 15 grams of water from the mushroom can effectively prevent the occurrence of breast cancer. 8.Cervical cancer: (1) Early symptoms: vaginal bleeding in drops after intercourse, defecation or activity, blood mixed with vaginal secretions. It appears in small amount at first and often stops on its own. Irregular vaginal bleeding, especially sudden vaginal bleeding after many years of menopause. Increased leukorrhea, bloody or flesh-washing. Pain in the lower abdomen and lower back. (2) Prevention: The factors of the development of cervical cancer are still unclear, and its development may be related to early marriage, early childbirth, multiple births, close births, multiple marriages, premature or frequent sexual life, husband’s circumcision, estrogen secretion disorder or abnormal metabolism, certain viruses such as herpes simplex type 2 virus and human papilloma virus infection, chronic cervicitis, cervical erosion and certain sexually transmitted diseases. In addition, it is also related to the patient’s low immune function and poor mental factors. Cervical erosion and viral infection (HSV-2, HPV) are high-risk factors for cervical cancer, so effective prevention of the above diseases and drinking tea with “12 grams of Longkui and 15 grams of Kuncao” is a good way to prevent cervical cancer. In addition, persistent hoarseness, wounds that do not heal, swelling that does not go away, ulcers on any part of the body, such as tongue, cheek mucosa, skin, etc. without trauma, especially those that do not heal for a long time, unexplained weight loss, sudden enlargement of moles or breakage, bleeding, loss of original hair, painless hematuria, etc. are all warning signs and need to be seen by a hospital in time. Precancerous lesions should also be considered as early signs. For example, mucosal leukoplakia, chronic skin ulcers, fistulas, proliferative scars (especially scars caused by chemical burns), atrophic gastritis and intestinal epithelial hyperplasia, multiple polyps in the rectum, skin keratosis (especially keratosis of the palm at the size of the fissure), cystic lobular hyperplasia of the breast, and cervical erosion may develop into cancer. In short, the occurrence of cancer is related to our own low immune function, and Astragalus can effectively improve the cellular immunity and humoral immunity of human body, healthy people can use “Astragalus 5g” to drink as tea or put it in tea together every day, which can play a At the same time, in our daily life, reasonable diet, keep a relaxed mood, avoid strong sunlight, minimize hair dyeing, eat less smoked, fried and pickled food, eat less pesticide-rich food, and actively exercise to improve resistance can be more effective in preventing and fighting cancer.