The symptoms of congestion and edema in the mucosa of the ascending colon, transverse colon and rectum may be due to physiological factors or intestinal infections, intussusception, etc., which need to be treated according to different causes. 1. Physiological factors: if you eat chili peppers, garlic and other foods, under the stimulating effect of these foods, can lead to intestinal mucosa transient congestion, edema, this is a normal phenomenon, do not need to worry too much. 2. Intestinal infections: if the intestinal tract is infected by bacteria or viruses, under the stimulation of inflammation caused by the infection, the intestinal mucosa will be congested and edematous, and then it is necessary to carry out rehydration and anti-infective treatments, such as ornidazole for the bacterial or viral infections. 3. Intussusception: Intussusception is a disease in which a section of intestinal tube is set into the lumen of its neighboring intestine, and the passage of intestinal contents is impeded, which can also lead to the manifestation of congestion and edema of the intestinal mucosa, and the treatment can be reset by enema, and surgical treatment is needed for the patients with secondary intestinal necrosis. If the intestinal mucosa is congested and edematous or continues to be unrelieved, it is recommended to consult a doctor in time to find out the cause and ask the doctor to deal with it.