Which symptom is commonly associated with severe dehydration?

Which symptom is commonly associated with severe dehydration?

• A. Headache
• B. Fatigue
• C. Cyanotic lips
• D. Nausea

Answer: (C)

When the body is severely dehydrated, the drop in circulating blood volume reduces perfusion to the brain and can disrupt electrolyte balance. This combination commonly manifests as a headache, which is a frequent symptom as the brain experiences changes in blood flow and osmolarity. Among the listed options, headache is the symptom that best fits what you’d expect with severe dehydration. Fatigue and nausea can also occur, but a headache is a classic and more consistently observed sign of significant fluid loss. Cyanotic lips, on the other hand, indicate a lack of adequate oxygenation (cyanosis), which points to hypoxemia or circulatory problems rather than dehydration alone, so it’s not characteristic of severe dehydration.

When the body is severely dehydrated, the drop in circulating blood volume reduces perfusion to the brain and can disrupt electrolyte balance. This combination commonly manifests as a headache, which is a frequent symptom as the brain experiences changes in blood flow and osmolarity.

Among the listed options, headache is the symptom that best fits what you’d expect with severe dehydration. Fatigue and nausea can also occur, but a headache is a classic and more consistently observed sign of significant fluid loss. Cyanotic lips, on the other hand, indicate a lack of adequate oxygenation (cyanosis), which points to hypoxemia or circulatory problems rather than dehydration alone, so it’s not characteristic of severe dehydration.