The occurrence and development of colorectal cancer go through a relatively long process, which provides the time for early diagnosis of colorectal cancer. With the extensive development of fiberoptic colonoscopy technology and advances in pathology, early diagnosis has been relatively easy to achieve. Early colorectal cancer symptoms are relatively insidious; therefore, early detection is the most urgent problem in colorectal cancer research, and early detection is of great significance to improve the survival rate of colorectal cancer. So, how to detect colorectal cancer in early stage? Please be a “mindful” person in life and pay attention to some issues that people may think are “not important”. Early symptoms: Generally, they are not obvious, but may include change in stool habit, loss of original stool pattern; alternating diarrhea and constipation; sometimes there is vague abdominal pain, which is similar to mild “tummy trouble” and easily misdiagnosed as “enteritis”. In some cases, the stool becomes thin or the surface is not smooth or grooved, and there is blood. Some patients also have unexplained chronic anemia, usually mild anemia, and some go to the doctor only when they are severely anemic. Blood in the stool is also a common symptom. Patients with rectal cancer can easily be misdiagnosed as “hemorrhoids” and delayed. What should I do if I have any of the above mentioned conditions? Experts suggest: If you have any stool problem, you should have a stool occult blood test to find out if there is hidden stool bleeding. Colorectal bleeding may be mixed with stool as it moves to the rectum and anus, and is not easily detected by the naked eye. If there is unexplained anemia, the cause of the anemia should be investigated so that the tumor can be detected in time. Many tumors can bleed and cause anemia. If you have hemorrhoids, you should ask a specialist to look at them. Don’t think that “nine out of ten men have hemorrhoids” and treat rectal cancer bleeding as hemorrhoid bleeding. Active examination: (1) routine stool and occult blood test; (2) if there is blood in the stool or the stool body becomes thin or the surface is not smooth or has grooves, an anal finger test should be performed. Generally, the finger examination can be done up to 7 cm above the anus, or anoscopy or colonoscopy can be done. (3) Barium infusion of the intestine can detect slightly larger lesions in the large intestine, but small lesions are not easily detected. (4) Full colonoscopy can detect lesions and take biopsy for pathological diagnosis. (5) Serum tumor marker examination has important reference value, and some patients with colorectal cancer may have increased tumor markers. The above information is used as health tips, and we hope that you will pay attention to stool habit and learn to detect colorectal cancer.