The color of the first stool after removal of transverse colon polyp tends to be darker and may appear coffee-colored. Transverse colon polyp removal surgery will lead to a certain amount of damage, after the operation may appear traumatic blood seepage, and blood in the intestinal digestive juices and bacterial action, along with the discharge of stools, often lead to darker stool color, and sometimes coffee-colored stools, which is a normal phenomenon. Generally, about 3 to 5 days after polypectomy of transverse colon, the phenomenon of blood seepage will gradually stop, and the color of stool will gradually return to normal, or still the color of stool has not improved, or even there is dark red blood in the stool, it is likely to be caused by intestinal hemorrhage. After the removal of transverse colon polyp, if the color of stool persistently does not change, you should go to the hospital in time and cooperate with the doctor’s examination for early treatment.