Nowadays, with the improvement of people’s living standards, more and more people pay attention to health issues. Despite adequate daily nutrition and proper exercise, many people still suffer from cancer. At present, many factors have caused the rise of cancer: polluted environment, poor dietary habits, negative effects, etc. Many people have questions about why they are the ones who get cancer. Is it really impossible to hide and avoid it? Actually, cancer is not that scary! Early prevention is more important than anything else, so let’s learn together below! Cancer: also known as malignant tumor, is a disease caused by the malfunction of the mechanism of controlling cell growth and proliferation. Cancer cells not only grow out of control, but also invade the surrounding normal tissues and even transfer to other parts of the body through the body’s circulatory system or lymphatic system. The causes of cancer are: the body is affected by environmental pollution, chemical pollution (chemical toxins), ionizing radiation, free radical toxins, microorganisms (bacteria, fungi, viruses, etc.) and their metabolic toxins, genetic characteristics, endocrine imbalance, immune dysfunction and other carcinogenic substances and factors that lead to cancerous transformation of normal cells in the body, which often manifests as localized masses formed by abnormal cell proliferation in local tissues. It is often manifested as a local mass formed by abnormal cell proliferation in local tissues. Cancer is a major type of disease caused by multiple mutations of normal cells in the body in multiple causes and stages. Local manifestations of cancer mainly include: 1. Lumps formed by malignant proliferation of cancer cells, which can be touched by hand on the body surface or deep. Cancer of thyroid, parotid gland or breast can be touched in the superficial part under the skin. Tumor metastasis to lymph nodes can lead to enlargement of lymph nodes, and certain superficial lymph nodes, such as cervical lymph nodes and axillary lymph, can be easily palpated. Certain superficial lymph nodes, such as cervical lymph nodes and axillary lymph, can be easily touched. As for stomach cancer and pancreatic cancer in deeper parts of the body, they can only be touched by pressing hard. Malignant tumors including cancer lumps grow rapidly and the surface is not smooth and not easy to push; benign tumors generally have smooth surface and slide easily like eggs and ping pong balls. 2.Pain The appearance of pain often indicates that the cancer has entered the middle or late stage. At first, it is mostly hidden pain or dull pain, which is obvious at night. Later on, it gradually worsens and becomes unbearable, day and night. General painkillers do not work. The pain is usually caused by the invasion of nerves by cancer cells. Ulcers are formed by the rapid growth of cancer tissues and insufficient supply of nutrients in certain surface cancers, resulting in tissue necrosis. For example, some breast cancers may have crater-like or cauliflower-like ulcers on the breast, which secrete bloody secretions and may have foul odor when infected. In addition, ulcers can also be formed in stomach and colon cancer, which can be observed only through gastroscopy and colonoscopy. 4.Bleeding It is produced by the invasion of blood vessels by cancer tissue or the rupture of small blood vessels of cancer tissue. For example, lung cancer patients can hemoptysis and blood in sputum; stomach, colon and esophagus cancer can bleed in stool. 5.Obstruction caused by the rapid growth of cancer tissue. When the obstruction is in the respiratory tract, it will cause difficulty in breathing; esophageal cancer obstructs the esophagus and causes difficulty in swallowing; cancer in the biliary tract can obstruct the common bile duct and cause jaundice; bladder cancer obstructs the urethra and causes difficulty in urination, etc. In short, different symptoms may occur depending on the location of cancer obstruction. 6.Other intracranial tumors can cause visual impairment (compression of optic nerve), facial palsy (compression of facial nerve) and other neurological symptoms; bone tumors can cause fracture due to bone invasion; liver cancer can cause ascites due to decrease of plasma albumin, etc. 11 common symptoms 1.Esophageal cancer The feeling of sluggishness, stagnation or slight obstruction in swallowing food may subside by itself, but it may appear again after several days, recurring and gradually worsening. Or when swallowing saliva or eating, it always feels pain in the sternum with positioning. Usually, it feels like there is a foreign body in the esophagus and it is not related to eating, it persists, and drinking water and swallowing food cannot make it disappear. 2.Stomach cancer suddenly appears with unexplained indigestion symptoms, and it is stubborn and fast progressing; the prominent manifestations are rapid decrease in appetite, abdominal fullness and discomfort after eating, and at the same time, the weight is obviously reduced. Or, people who did not have stomach pain (“heartburn”) in the past suddenly have recurrent stomach pain; although they had stomach pain in the past, the intensity, nature and duration of the pain suddenly changed recently, and the drugs that were effective in treatment became ineffective or poor. 3.Colorectal cancer If people over 30 years old have abdominal discomfort, hidden pain, bloating, change in stool habit, constipation, diarrhea or alternately, feeling of falling, and blood in stool, followed by anemia, fatigue and weakness, and lumps in the abdomen, the possibility of colorectal cancer should be considered. Among them, limited and intermittent hidden pain along the colon area is the first alarm signal of colon cancer. The obvious feeling of falling with blood in stool is the signal of rectal cancer (colon cancer includes colon cancer and rectal cancer). 4.Liver cancer Early stage liver cancer has no specific symptoms, if there are 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 indigestion, accompanied by persistent diarrhea and significant weight loss. 5.Nasopharyngeal cancer 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. 6.Brain tumor The main manifestations are headache and vomiting. The headache is very special, often the heaviest when waking up in the early morning, and can be gradually reduced after getting up, obvious in the forehead, back of the occipital area and both sides. The headache is often accompanied by vomiting, which is not related to eating, especially when the pain is severe, and the headache will be relieved after vomiting. 7.Lung cancer Cough is the early symptom of lung cancer, 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 pus 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. 8.Breast cancer Abnormal changes occur in breast, such as thickening or lump, swelling, micro-concavity (“dimple sign”), thickening and redness of skin, nipple deformation, retraction or scaling, pain or pressure pain, and sudden unilateral nipple flow (milk-like, blood-like, water-like liquid) in non-lactating women. 9.Cervical cancer The early symptoms of cervical cancer mainly include the following Vaginal spotting bleeding after sexual intercourse, defecation or activity, blood mixed with vaginal discharge. It appears in small amount at the beginning 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. Any one of the above should be checked promptly. The focus is on irregular vaginal bleeding, contact bleeding and excessive leucorrhea. 10.Leukemia (blood cancer) Fever, bleeding and anemia are the three major early symptoms of (acute) leukemia. Fever of 37.5℃-38.5℃ often suggests infection, such as inflammation of the skin, respiratory tract, intestines, oral cavity, urinary system and other parts. Bleeding can occur at any site, but is common in the subcutaneous, oral, nasal, and gingival areas. The degree of bleeding can range from petechiae and petechiae to hemorrhage from the mouth and nasal cavity. Anemia is due to impaired hematopoiesis and bleeding in the red system and evolves rapidly, and the patient is pale. In addition, swollen lymph nodes and bone and joint pain may appear, and the characteristic one is light pressure pain in the sternum. 11.Bone cancer A hard lump on the surface of the bone, painful or not. Bone and joint pain or swelling, often heavier at night, and not necessarily related to activity; pain can be constant dull pain, or pain felt only when under pressure. Spontaneous fractures. Fever, weight loss, fatigue, and decreased mobility sometimes occur in advanced bone cancer. Benign bone cancer is usually painless; you should seek medical attention when the following conditions occur Practical Tips for Cancer Prevention 1. Drinking soy milk can prevent “female cancer” According to the American Association for Cancer Research, women who often drink soy milk have a much lower risk of breast cancer. Nutrition experts told reporters that this is because there is a substance in soy milk that resembles estrogen, called “soy isoflavones”, which can play the role of a fake, and is very similar to the mechanism of anti-cancer drugs. It has a preventive effect on all estrogen-related cancers, such as breast, endometrial, cervical and prostate cancers. However, people who are already suffering from these cancers are advised not to drink soy milk to avoid stimulation of cancer cells. In addition, people suffering from peptic ulcers, gastritis, and ventilation should also drink less. Soy milk is best to drink your own ground, many sold on the street are brewed with soy milk powder, the content of soy isoflavones is very low. 2, walk for an hour a day A 30-minute walk after meals or a four-hour walk every week can reduce the risk of pancreatic cancer by half. A long-term study of 70,000 people at the Harvard School of Public Health also found that just one hour of walking a day can reduce the chances of getting colon cancer by half. This is because pancreatic cancer is associated with excess body heat, and walking burns calories, which can directly prevent pancreatic cancer. In addition, sweating after exercise can make carcinogenic substances such as lead and strontium excreted from the body with sweat, thus playing a role in cancer prevention. 3.Drink 6 glasses of water a day Men who drink 6 glasses of water a day (240 grams per glass) will reduce the risk of bladder cancer by half, and women will reduce the risk of colon cancer by 45%. This is because drinking water can increase the number of urination and defecation, which may stimulate the bladder mucosa, colon harmful substances, such as urea, uric acid, etc. out of the body. However, it is best to check the colonoscopy every two or three years for people over 40 years old, and if there are polyps, early detection can reduce their chances of cancer. 4.Eating with onion and garlic In China, the province with the lowest incidence of stomach cancer is Shandong, a major province of onion and garlic cultivation. Among the four counties with the lowest mortality rate of stomach cancer north of the Yangtze River, the first one is Cang Shan County in Shandong, where each person eats 6 kg of garlic every year. This is related to the fact that allicin has an antioxidant effect and can reduce the level of carcinogenic nitrite in the human body. Some studies have shown that people who eat more garlic have a 60 percent lower risk of getting stomach cancer. Garlic only produces allicin when it is crushed and fully combined with oxygen, and it is very unstable and loses its effect quickly when exposed to heat. Therefore, it is best to crush garlic and eat it raw, or chop it into garlic paste and put it in cold dishes. 5, 15 minutes of sunshine In the cheapest cancer prevention prescription, sunshine is considered to be the ultimate, without any cost, can play a role in cancer prevention by increasing the content of vitamin D in the body. Experts say that insufficient vitamin D increases the risk of breast, colon, prostate, ovarian and stomach cancers. In order to avoid exposure to the sun to increase the risk of skin cancer, just 15 minutes of sunshine a day is enough. 6.Four cups of green tea a day The Japanese who love tea have spent nine years doing a survey and found that drinking as little as four or five cups of tea a day can reduce the risk of cancer by 40 percent. The cancer prevention effect of tea has been studied for 17 years and found that oolong tea, green tea and black tea have good preventive effects on oral cancer, lung cancer, esophageal cancer, liver cancer and so on. Among them, green tea, including Longjing, Biluochun and Mao Feng, has the most significant effect, and its cancer prevention ingredients are five times more than other teas. However, it is best not to drink tea that is too strong and too hot, otherwise it will affect its anti-cancer effect. The best tea drinking temperature should be about 60 degrees Celsius, and the tea should be steeped for 5 minutes before the active ingredients can be dissolved in the water. 7.Open windows for at least half an hour Few people know that besides formaldehyde, there is also a very strong carcinogenic gas – radon and its daughter. It is usually hidden in granite, cement and tiles, and spreads indoors along the cracks in these places and enters human body through respiratory tract, which will induce lung cancer after a long time. In fact, as long as the windows are opened for half an hour every day, the concentration of radon can be reduced to the same as outdoor. In addition, radon will also be generated after natural gas burning, so when boiling water in the kitchen, it is better to open the window and close the door connected with the living room. 8.Wipe your back with a dry towel There was a craze in Japan to wipe your back with a dry towel. This can play a role in cancer prevention, because friction and heat will activate a kind of cell in the subcutaneous muscle tissue of the back, which can play the role of engulfing and destroying cancer cells. For middle-aged and elderly people, whether it is rubbing, rubbing or scratching the back, it is a good health care method. Or use the ends of a dry towel, straight and horizontal repeatedly rub the entire back for about 10 minutes, until the skin is red and hot. 9, chew a bite of rice 30 times People who always gulp down their food have a higher chance of stomach cancer. Chewing more can reduce the burden of food on the digestive tract and lower the risk of gastrointestinal cancer. In addition, the University of Georgia experiment found that saliva has a strong “anti-toxic” effect, which can make the toxicity of aflatoxin, the main culprit of liver cancer, disappear almost completely within 30 seconds. Therefore, according to the calculation of chewing once a second, it is better to chew a bite of rice 30 times to have cancer prevention effect. 10.Sleep enough 7 hours Women who sleep less than 7 hours per night have a 47% higher chance of breast cancer. This is because sleep produces a melatonin, which slows down the production of estrogen in women’s bodies, thus serving the purpose of inhibiting breast cancer. It is best to start washing up before 10:30 p.m., get ready for bed, make sure you go to sleep before 11 p.m. and get up at 6-7 a.m. In addition, German sleep experts point out that 1:00 pm is an obvious peak of sleep during the day, and a nap at this time can also enhance the activity of immune cells in the body and play a certain role in cancer prevention.