Sigmoid colon visible 1.5 x 1.2 subtympanic bulge refers to subtympanic colon polyp. 1. Colonic polyp is a bulging lesion that protrudes from the mucosal surface into the intestinal lumen, which is generally categorized into broad-based and tipped according to the morphology, leading to the etiology of colonic polyps is unclear, and it is mostly considered that it may be related to age, lifestyle and dietary habits, infections, long-term inflammatory stimulation, and heredity, etc. The polyps in this location may not cause obvious symptoms because the sigmoid colon is not near the anus. Because the sigmoid colon is not close to the anus, polyps in this position may not lead to obvious symptoms, mostly due to other gastrointestinal symptoms detected during examination. 2. Colon polyps can be clearly diagnosed through colonoscopy and pathology, such as the results for benign polyps, the location of subtypical polyps can be resected through the colonoscopy ligation treatment, regular follow-up after treatment as prescribed by the doctor. It is recommended that patients go to the hospital in time.