What can remain unchanged even after pain medication is given?

While pain medication is designed to alleviate pain, it does not guarantee that the pain level will change immediately or at all. Pain is a complex experience involving physical and psychological components, and various factors influence how an individual perceives pain. Even with medication, some patients may experience persistent pain due to underlying conditions, tolerance, or individual reactions to the medication.

In contrast, fever, muscle tension, and emotional state can all be impacted by various factors separate from the administration of pain medication. For instance, a fever may persist if it is a response to an ongoing infection, muscle tension can arise from anxiety or stress, and emotional states may fluctuate based on numerous environmental and psychological factors, often independent of pain management. Thus, while pain medication aims to alleviate discomfort, it doesn't always produce a change in pain level.