Which of the following is a common sign of pain in patients?

Guarding or moaning is a recognized sign of pain in patients. When individuals experience discomfort or pain, they often exhibit protective behaviors, which can include guarding an area of the body that hurts or making vocalizations such as moaning. These reactions are instinctive and serve as a way for the body to communicate distress. Such signs are important for healthcare providers, as they can indicate that a patient may require attention for pain management.

In contrast, smiling and laughing can sometimes indicate a person's attempt to cope with or mask discomfort, rather than an absence of pain. A quiet and calm demeanor might be misleading; some patients may not express their pain outwardly due to various reasons such as fear, stoicism, or being in an environment where they feel they need to remain composed. Likewise, sharp and focused responses can be indicative of a patient who is alert and oriented but does not necessarily correlate with a lack of pain. Understanding these nuances is essential for accurately assessing a patient's condition and providing appropriate care.