Which sign would NOT typically be noted in a child with dehydration?

The presence of warm extremities in a child with dehydration is atypical and would not typically be noted. When a child is dehydrated, the body responds by constricting blood vessels in the extremities to maintain blood flow to vital organs, which can lead to cooler temperatures in the hands and feet. This process is part of the body's compensatory mechanisms during states of reduced fluid volume.

On the other hand, dry mucous membranes, cold extremities, and irritability are all common signs of dehydration. Dry mucous membranes indicate inadequate hydration and are easily assessed in the mouth and lips. Cold extremities suggest reduced peripheral circulation due to the body's prioritization of vital blood flow. Lastly, irritability often arises from discomfort, fatigue, or distress associated with dehydration, reflecting the child’s physiological state. Understanding these signs helps in identifying dehydration and implementing appropriate management strategies promptly.