Radiation enteritis is a medical condition caused by radiation therapy for cancer. It results in inflammation of the small intestine leading to painful symptoms such as diarrhea, bloating, and abdominal cramps. Synonyms for radiation enteritis include radiation-induced enteropathy, radiation-induced gastrointestinal toxicity, and radiation-induced small bowel disease. The severity and duration of symptoms vary from patient to patient. Treatments include dietary changes, medications to manage symptoms, and in severe cases, surgery. Radiation enteritis can significantly affect a patient's quality of life, and it is crucial for individuals undergoing radiation therapy to work closely with their physicians to minimize the risk of developing this condition.