Radiation therapy may also cause a decrease in the number of white blood cells that help protect the body against infection. Most of these side effects can be treated or controlled and in most cases they are not permanent. Radiation therapy in young children may result in future learning difficulties and reduced growth. During cancer treatment, patients may lose their appetite and find it hard to eat well. In addition, the common side effects of treatment, such as nausea, vomiting or mouth sores, can make it difficult to eat.
Some patients find that foods taste different.
Others may not feel like eating because they are uncomfortable or tired. Eating well means getting enough calories and protein to help prevent weight loss and regain strength. Patients who eat well during cancer treatment often feel better and have more energy. In addition, they may be better able to handle the side effects of treatment. Every successful cancer treatment being used today started as a clinical trial, a three-step research process to evaluate the safety and effectiveness of a new treatment.