Urinary Tract Infection

Upper Urinary Tract Infection

Learn the common signs and symptoms of an upper urinary tract infection, such as lethargy and loss of appetite.

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This boy of four weeks has an upper urinary tract infection. He is lethargic and unhappy, and he is crying a lot. He has a fever and is eating less than usual. In small children, this can be a sign of urinary tract infection.