Final answer:
The nurse should ask the client about their concerns regarding treatment for pain to open up a conversation and provide support.
Step-by-step explanation:
The nurse should ask, 'Tell me about any concerns you have regarding treatment for pain.' This question allows the nurse to gain insight into the client's thoughts and worries about pain management without being judgmental. It opens up a conversation where the nurse can provide education and support, and work collaboratively with the client to find a suitable pain management plan.