Question
The child’s urine has hidden blood, and after a urine test, it was found to have five plus signs. After being administered intravenous saline, the number reduced to one plus sign, but it appeared as two plus signs again during the follow-up check. Although the ultrasound examination of the kidneys and bladder showed normal results, the cause of the hidden blood remains unclear.
Answer
Hidden blood in urine is a common symptom of IGA nephropathy and nephritis, but it does not necessarily indicate the presence of these diseases. Further examinations, such as a urinalysis, protein level detection in urine, and a urine red blood cell deformation rate test for those with high proteinuria, diabetes, or hypertension, can help determine the source of hematuria.