Cancer in children, though uncommon, remains a major cause of morbidity and mortality. Advances in pediatric oncology have improved survival, but treatments like chemotherapy and radiotherapy lead to significant adverse effects. Because developing tissues and immature immunity make the oral cavity highly susceptible, oral complications are among the earliest and most frequent issues during cancer therapy. Common problems include mucositis, xerostomia, candidiasis, viral infections, gingival bleeding, taste changes, and, in cases of head and neck radiation, trismus, enamel defects, and...