Which clinical sign is associated with dengue with warning signs?

Persistent vomiting leading to dehydration is a critical clinical sign associated with dengue with warning signs. In cases of dengue, especially when warning signs are present, patients may experience severe nausea and ongoing vomiting, which can lead to dehydration and other complications. This symptom serves as a warning for clinicians to closely monitor the patient and provide appropriate interventions, such as rehydration, to prevent further deterioration.

Other choices do not indicate warning signs of dengue. Normal urination typically suggests adequate hydration and may not signal any severe complications. A stable heart rate can be reassuring but does not specifically relate to dengue warning signs. The absence of abdominal discomfort would generally indicate less severe cases, as abdominal pain is often a common symptom associated with serious dengue presentations.