Identify a sign that a patient may be in pain.

A sign that a patient may be in pain can prominently be observed through facial grimacing or moaning. These physical indicators often manifest as a response to discomfort or distress. Grimacing may involve tightened facial muscles, furrowing of the brow, or changes in facial expression that convey discomfort. Moaning or other vocalizations can indicate that the patient is experiencing pain that requires attention.

Unlike the other options that suggest the patient is feeling content or relaxed, facial grimacing and moaning specifically signal distress. If a patient is smiling and talking freely, sleeping soundly, or exhibiting cheerfulness and cooperation, they are more likely to be comfortable rather than experiencing pain. Therefore, noticing changes in facial expressions and vocal sounds is essential for healthcare providers to assess a patient's pain level accurately and provide the necessary support and intervention.