Sophie was diagnosed with a kidney infection. She was complaining of stomach cramps, dry skin on her arms and legs, pain in her lower back, and headaches behind her eyes. Which of her symptoms helped her doctor diagnose her?

A kidney infection commonly causes pain in the back or side, near the kidneys. Of Sophie’s symptoms, pain in her lower back best fits that pattern and could help her doctor diagnose the infection. Stomach cramps, dry skin, and a headache behind the eyes are less specific to a kidney infection.

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