A bulging erosion in the descending colon is generally benign, but the possibility of malignancy can not be ruled out, and it is recommended that the patient be treated as soon as possible. A bulging erosion of the descending colon is generally benign, may be mucosal inflammation, such as ulcerative colitis, drug colitis, etc., the main symptoms are blood in the stool, abdominal pain, diarrhea, and so on. Should be treated in the hospital as soon as possible, usually can achieve better therapeutic effect, for example, patients with ulcerative colitis can use mesalazine enteric-coated tablets and other drugs under the guidance of the doctor. Of course, the descending colon elevated lesions with erosion can not be excluded from the possibility of malignancy, need to perform colonoscopic biopsy, and ultimately rely on the pathological results to determine whether the malignant lesions. If the lesion of descending colon is not treated for a long time or repeated attacks, it is very likely to lead to malignant cancer, which will bring serious effects to the patient’s body, so the patient should pay attention to this symptom and actively consult the doctor for treatment. A bulging erosion in the descending colon is not necessarily malignant, and it is recommended that patients go to the hospital in time for examination to find out the cause of the problem and treat it symptomatically, so as to avoid deterioration and adverse consequences.