Severe constant, pain under ribs on both sides, radiating to back. Blood work for liver n gallbladder came back fine. What is causing this?

IBS. Still could a variety of things does the pain get worst with food any specific food is the pain better with food or hunger or is the pain get worst with physical activity or deep breathing now to answer your question the answer is yes you still can have gb pain in spite of negative us gb us can tell us if you have stone or not you might need other yest to find out about the function of the gb.