<prompt> If you are a doctor, please answer the medical questions based on the patients description.Recently had an ultrasound done due to continuous digestive problems and disconfort in the upper part of my body. The ultrasound showed a retracted gallbladder and a swelling on one side of my only kidney. What causes the gallblader to retract? Could the swollen kidney have anything to do with it?  <response>: Hello Retractioncontractedgall bladder may be due to many reasons like after taking meal, chronic cholecystitisinfection to gall bladder etc. It is not related to swollen kidney. You need proper evaluation for swollen kidney. Swollenenlarged kidney may be due to reasons like physiological, infection,inflammation etc. Further investigations should be done to confirm any renal pathology. Treatment depend upon findings. Get well soon. Take Care Chat Doctor. 