What exactly is reflux nephropathy?

Kidney issue/backflo: Occurs when there is obstruction to the flow of urine downstream, or when there is back flow of urine into kidney. Causes pressure problems which affect filtration and blood flow.

Kidney injury: Reflux nephropathy describes kidney function deterioration due to urine washing bac up to the kidney during urination (reflux) - this is almost always due to associated infection or series of infections in childhood although this is somewhat controversial. Reflux is a condition you are born with and cannot catch.