Cancer can affect various parts of the body, including the digestive system, making it challenging for some patients to eat and drink normally. [Head and neck cancers](), esophageal cancers, and certain [gastrointestinal cancers]() can obstruct normal swallowing. Additionally, side effects from treatments like [chemotherapy]() and [radiation therapy]() may cause nausea, vomiting, or mouth sores, further complicating nutritional intake.
