A 36-year-old with complaints of fever, nausea, and vomiting for 2 days following burning micturition for 5 days. Examination findings revealed costovertebral angle tenderness. Identify the diagnosis.

The diagnosis is likely acute pyelonephritis. This is a bacterial infection of the kidneys that typically presents with fever, nausea, vomiting, and flank pain or costovertebral angle tenderness. The burning micturition for 5 days prior to the onset of systemic symptoms is suggestive of a urinary tract infection that has ascended to the kidneys. Further evaluation with urine analysis and culture, as well as imaging studies such as a renal ultrasound or CT scan, may be needed to confirm the diagnosis. Treatment typically involves antibiotics and supportive care.

Pyelonephritis