What happens when one kidney does not empty properly?

When one kidney does not empty properly, it can lead to a condition called hydronephrosis, where urine builds up in the kidney due to a blockage or obstruction in the urinary tract. This can cause swelling, pain, and potential damage to the kidney tissue. Over time, if left untreated, it may result in kidney dysfunction or failure. Prompt medical evaluation and treatment are essential to prevent complications.