Rectal cancer (rectalcancer) is a common malignant tumor in the gastrointestinal tract, second only to stomach and esophageal cancer in incidence, and is the most common part of colorectal cancer. Among rectal cancer patients, there are more men than women, and their ages range from 40 to 60 years old. Rectal cancer is a lifestyle disease. Therefore, diet and lifestyle are the bane of cancer. In recent years, the incidence of colorectal cancer in China has been on a significant rise, and the incidence rate in Shanghai alone has increased 2 to 3 times in 20 years. What is especially noteworthy is that the proportion of young people suffering from colorectal cancer is increasing. Blood in stool is one of the most common symptoms of early rectal cancer, but it is often overlooked by patients who think it is other diseases such as dysentery, enteritis or hemorrhoids. Patients with early stage rectal cancer will also experience changes in stool habits, frequent bowel movements, and discharge of mucus and pus-like substances, which mostly occur in the early morning shortly after waking up, and then gradually increase in number, even unable to sleep at night, changing the usual stool habits. Rectal cancer will cause stenosis and obstruction, thinning of stool formation, difficulty in defecation, constipation, abdominal discomfort, gas and pain in about 1 to 2 years. If the anal sphincter is involved, it will also cause anal incontinence, pus and blood stool, and soiling of underwear. Patients with intermediate and advanced rectal cancer can see systemic symptoms such as loss of appetite, weight loss and anemia. The treatment of rectal cancer generally adopts surgery, which can be radical surgery and has a high cure rate. If the local infiltration of cancer is serious, the metastasis is extensive or the patient is too old for surgery, radiotherapy is also a good choice for patients with advanced rectal cancer, but radiotherapy is more harmful to the body, so patients with poor physical function should choose it carefully, and it is more likely to recommend the conservative treatment of Chinese medicine for such patients. Although the short-term effect is not as obvious as chemotherapy, the long-term effect is good, and it is better in improving the quality of survival and prolonging the survival period. As mentioned above, rectal cancer is a lifestyle disease, so rectal cancer is still very preventable. First of all, we need to correct the bad eating habits and give up the preference of three high and one low (i.e. high fat, high calorie, high protein and low fiber) eating habits. Eat less barbecue, fried and high-fat greasy food, and eat more coarse grains, vegetables and fruits. Also keep your bowels open and develop the habit of having regular bowel movements every day. Keep exercising, exercise can relax yourself and relieve stress, it can also affect hormone levels, metabolic rate and is helpful in improving the body’s immunity. If you have recently experienced a series of symptoms of blood in stool and suspect that you have rectal cancer, the easiest thing to do is to go to the hospital for examination, rectal finger examination and proctoscopy are very popular methods. Of course, there is no need to be too nervous, cancer is a disease with a very small chance, most may be bacterial dysentery, chronic colitis other. If you are younger, hemorrhoids are still the most likely. In a word, when your stool habits and traits change, rectal cancer must be ruled out!