<s>[INST] I have severe pain under my ribs in my back. Lying flat will help, but I can t stay up to get my house work done. I had my right kidney removed three weeks ago. A tumor was found that is in stage II. i DON T KNOW WHAT IS GOING ON WITH MY BACK UNDER MY RIB CAGE.. [/INST] HelloThanks for query. You have not mentioned whether you are getting pain On rt side where kidney is removed or on left side. The pain on Right side could be mostly due to surgical trauma and will get resolved over a period of few months. If the pain is on left side it could be due to presence of stone either in kidney or ureter and needs to be confirmed by Ultrasound Scanning of abdomen. Consult the operating surgeon for assessment and further treatment. Chat Doctor.  </s>