This guide helps chemotherapy patients manage mouth or throat sores (mucositis), a painful side effect that can affect eating and drinking. It provides practical oral care strategies including using soft-bristled toothbrushes, alcohol-free mouthwash, eating cold soft foods, avoiding spicy or hard foods, and using topical pain medications like bonjela. The material emphasizes seeking medical attention for signs of infection, severe pain, inability to eat or drink for 12+ hours, or dehydration symptoms.