Hi. I have a son who just turned three. He has been having back pain for over a year. He has been diagnosed with hypotonia and is doing physical therapy for it. Last Friday he woke up with a fever and very sick still complaining more than ever about his back. We went to the er and they said it was a virus. His pediatrician ordered a renal ultrasound, which was done today. The tech told be she saw a blockage on both sides but worse on the left. She said it was called hydronephrosis . What will this mean for us?
HiT hanks for the query. Hy Chat Doctor.  It occurs when there is an obstruction to the passage of urine anywhere in the urinary tract. Depending on the severity and cause of the obstruction, the patient may have a range of symptoms from asymptomatic to urine infections to kidney damage. So I suggest a visit to a pediatric nephrologist/urologist as soon as possible. Hope this helps Good luck