A nurse is reinforcing teaching with a client who is to have a plaster cast applied to his right arm. Which of the following information should the nurse include in the teaching?

A. Incorrect. Plaster casts are not waterproof and can become weakened if exposed to moisture, so showering with the cast is generally not recommended. B. Correct. Elevating the extremity can help reduce swelling and promote comfort after the cast is applied. C. Incorrect. Using a hair dryer inside the cast can cause burns and is not recommended for relieving itching. D. Incorrect. Keeping the cast covered is not necessary, and covering it can trap moisture, potentially causing skin problems.