Whether or not a 0.5cm cecum polyp is serious is mainly related to the type of condition. Ordinary polyps 0.5cm in size are not serious and do not require much intervention; if they are adenomatous polyps, they are a relatively serious condition and require surgery. 1. Ordinary polyps do not affect the physical condition too much, do not cause discomfort and are not serious, and do not require too much treatment. 2. If the polyp belongs to adenomatous polyp through pathological examination, there is the possibility of malignant changes, which is a more serious condition, it is necessary to undergo radical resection through surgery. If the polyp of the cecum increases in size and causes abnormal defecation, it is necessary to consult a doctor in time for observation and standardized treatment after diagnosis of the condition, so as to avoid delaying the condition.