Colorectal cancer, i.e. colorectal cancer, including colon cancer and rectal cancer, is a common malignant tumor. In the past 20 years, the incidence rate of colorectal cancer in China has been on the rise. However, colorectal cancer grows slowly and has a long latency period, and some symptoms often appear in the early stage, so it is necessary to find out the early symptoms in time. Pay attention to the distress signals issued by the body The appearance of these 4 symptoms in life may indicate colorectal cancer, so be vigilant and go to the hospital in time. Blood in stool Blood in stool is the earliest and most common manifestation of colorectal cancer. As nine out of ten people have hemorrhoids, many people think that blood in stool is hemorrhoids. However, the color of blood in stool of colorectal cancer patients and hemorrhoids patients is different. The color of blood in stool of hemorrhoids patients is bright red, on the surface of stools, the blood does not mix with feces, and there can be blood dripping down after discharging stools. The color of blood in stool of patients with colorectal cancer is darker, more mixed with stool, and the stool is mostly dark red, jam color or tar-like. Change of defecation habit (1) Change of defecation frequency: from 1 time a day to 3~4 times a day, or 1 time a few days. (2) Changes in stool characteristics: the stool was originally soft and well formed, but recently it has become distorted and thin. (3) Other changes: having the feeling of not being able to defecate cleanly, having difficulty in defecation, or having diarrhea and constipation alternately. Abdominal pain Colorectal cancer may cause some patients to suffer from abdominal pain, abdominal discomfort, abdominal distension, etc. If there is a bout of abdominal cramps, the patient may suffer from abdominal pain. If there is a bout of abdominal cramps, and the pain suddenly disappears after exhaustion, it is necessary to raise vigilance. 4.Anemia After excluding other causes of blood loss, if anemia occurs, the possibility of colorectal cancer should be considered. Although colorectal cancer is mostly seen in middle-aged and old people aged 50-75, it prefers high-risk groups, and those who meet any one or more of the following criteria are regarded as high-risk groups: 1) Family history: history of colorectal cancer in first-degree relatives (i.e., father, mother, siblings, children, etc.), as well as history of familial adenomatous polyps; 2) Disease history: history of colorectal cancer in oneself, or history of pre-cancerous diseases such as adenomatous polyps of the colon or ulcerative colitis; 3) history of chronic diseases and poor health; 4) history of chronic diseases and poor health; 5) history of colorectal cancer in the family. History of chronic diseases and poor life history Those who have two or more of the following: chronic diarrhea, chronic constipation, previous mucous blood stools, chronic appendicitis or appendectomy, chronic cholecystitis or gallstones, and poor life history (high protein, high fat diet, smoking, sedentary lifestyle, etc.); and 4. Occult blood test Those who have a positive occult blood test on any one occasion. High-risk groups should follow the doctor’s advice and have annual colonoscopy on schedule. If there are no conditions for colonoscopy in remote and mountainous areas or if the economic conditions are poor, at least fecal occult blood test and anal fingerprinting should be done once a year after the age of 40, which can be used as the initial screening for colorectal cancer. A positive occult blood test or abnormal fingerprinting should be carried out in time for colonoscopy. General population It is recommended to do fecal occult blood test once a year starting from the age of 50 and colorectoscopy once every 3~5 years. People with a positive fecal occult blood test should have a timely colonoscopy. If the economic conditions permit, the 1st colonoscopy can be done earlier than after 40 years old. Early detection of colorectal cancer and timely treatment are the main means to reduce the mortality rate of colorectal cancer. If any of the above situations occur, for the sake of your health, hurry up to check it!