Which clinical sign in an infant with diarrhea indicates that dehydration is not severe?

• A. Soft anterior fontanel that is not sunken
• B. Significantly sunken eyes
• C. Very dry lips
• D. Lethargy

Answer: (A)

In infants, hydration status is judged by clinical signs, and the anterior fontanel is a practical indicator. A soft, non-sunken fontanel means there is enough fluid in the body’s tissues and the dehydration is not severe. When dehydration worsens, the fontanel may become sunken as overall fluid volume decreases, so a non-sunken fontanel suggests a milder or no dehydration.

By contrast, signs like significantly sunken eyes, very dry lips, or lethargy point toward greater fluid loss and more serious dehydration. Lethargy, in particular, raises concern for severe dehydration and the need for urgent care.