Hi Thanks for posting your query As you told swelling felt under the rib cage is liver. Technically it is called hepatomegaly (enlarged liver) It can be tender itself or can cause pain when size is massive. Enlarged liver definitely require complete evaluation work up require lot of tests and imaging and should be done according to clinical condition. Cause may be simple infection, malaria to some cancers. Kindly discuss with doctor get complete information what kind of test have been done and what is their impression Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries. Dr Jeetendra Sharma Senior Consultant Critical care Medicine.