Which symptom is consistent with a functional bowel obstruction?

A functional bowel obstruction typically presents with symptoms related to the gastrointestinal system, primarily affecting the movement and function of the intestines. Steady abdominal pain is a common symptom because it arises from the increased pressure and distension in the bowel due to the obstruction. As the intestines attempt to move contents through the obstructed area, this can result in cramping and persistent discomfort, which is characteristic of this type of obstruction.

In contrast, other symptoms such as rapid heartbeat, skin rashes, and high fever do not specifically align with a functional bowel obstruction. While the body may react to severe pain or dehydration with tachycardia (rapid heart rate), this is not a direct symptom of the obstruction itself. Skin rashes and high fever are typically indicative of infections or inflammatory conditions, rather than issues specifically tied to the function of the bowel in the context of an obstruction. Thus, steady abdominal pain is the symptom that most strongly correlates with functional bowel obstruction.