Rectitis is one of the common diseases of the digestive system, mainly characterized by changes in the nature and frequency of stool. It might involve simple inflammation of the rectum, but it is also necessary to rule out the possibility of inflammatory bowel disease. In such cases, it is first necessary to clarify the specific nature of the condition, and then targeted treatment can be adopted. It is also important to pay attention to daily habits, and the diet should be light and easy to digest. For example, cooked soft noodles, soft rice, and fresh vegetables should be prioritized, while spicy, greasy, and irritating foods should be avoided. As for corn, it is rich in nutrients and should not have obvious adverse reactions on the gastrointestinal tract, so patients with rectitis can consume it.