Abnormal stool is usually an intestinal problem, such as enteritis. However, nowadays, cancer is so prevalent and colorectal cancer is more and more common, so it is more important to be alert to colorectal cancer when abnormal stool occurs. Active screening, such as colonoscopy, is recommended for people of appropriate age or at high risk. However, observation of stool is also an important way to detect colorectal cancer, and abnormal stool should not be taken lightly. However, almost everyone has stool abnormalities, and it can be said that they are very common, so we should not worry about colon cancer whenever there is abnormal stool and carry unnecessary burden. What kind of stool abnormalities should be alerted to the possibility of colorectal cancer? In fact, all cancer symptoms are not specific, that is to say, they are not exclusive to a certain kind of cancer, other diseases may also have similar performance, so it is difficult to judge by symptoms alone, but some symptoms do require high attention. 1. Change in the number of stools, from once a day to several times a day or alternating constipation and diarrhea. Change in stool habits, such as the principle of having a bowel movement on time every morning, but now it becomes irregular, or constipation or increased bowel movements. 3.Changes in stool characteristics, for example, the original was formed, but now there are mucus stools, dark red blood stools or become thin strips, with fixed indentation, etc. If your stool appears some of the above manifestations, and persistently can not be relieved, you have to pay attention, go to the hospital for examination as soon as possible, do not repeatedly delay. Doctors usually perform tests such as rectal examinations, stool tests, and colonoscopies. Of course, don’t think that if you have these stool abnormalities, it is definitely colorectal cancer, and don’t dare to go to hospital for examination.