Whether the gastrointestinal polyps are serious or not, there are several analyses as follows: First, it depends on the size of the polyps, generally the larger the diameter the higher the possibility of malignancy. Second, it depends on the location of the polyp, generally the upper part of the digestive tract, such as polyps in the esophagus, has a lower cancer rate, while the distal part of the digestive tract, such as rectal polyps, has a higher cancer rate. The cancer rate of a single polyp is relatively low, while the chance of more than three polyps is relatively high. Generally, polyps with irregular shape, rough and uneven surface or even nodules, hard texture and easy to bleed are more likely to become cancerous. Fifth, look at the pathological type of gastrointestinal polyps, if it is a misshapen polyp or inflammatory polyp, it is not serious, while gastrointestinal adenomatous polyps are more likely to become cancerous, it is more serious.