The nurse should discuss the increased risk of health problems associated with obesity, such as heart disease, diabetes, and high blood pressure. With a BMI of 34.8, the client is considered obese, and the nurse should emphasize the importance of maintaining a healthy weight through diet and exercise. Additionally, the nurse may want to discuss other risk factors that may be present, such as family history of heart disease or diabetes, and work with the client to develop a plan to manage these risks.