Hydronephrosis happens when the kidney swells due to a buildup of urine. But what’s the main cause? Dr. Mallikarjuna Reddy N, Senior Consultant in Urology & Robotic Surgery and Clinical Director at Yashoda Hospitals, explains that the most common reason is a blockage or obstruction in the urinary tract, which prevents urine from draining properly. The good news? With timely diagnosis and advanced treatments like robotic surgery, hydronephrosis can be effectively managed and kidney health preserv