Which of the following is not a common sign of dehydration?

• A. Thirst
• B. Dark urine
• C. Fever
• D. Dizziness

Answer: (C)

When the body is dehydrated, signals arise to preserve fluid and maintain blood volume. Thirst is a direct cue to take in fluids, and dark urine reflects the kidneys concentrating urine to conserve water. Dizziness can occur as reduced circulating volume affects blood flow to the brain. Fever, however, comes from the body's immune response to infection or illness, not from fluid loss. It’s not a defining sign of dehydration, even though someone who is dehydrated might also feel unwell with an infection. So fever isn’t a common dehydration sign, while thirst, dark urine, and dizziness are.