My mother is having multiple gall stones but cbd is clear. she develops upper back pain or sometimes rt. sided upper abdomen pain but only on exertion?

Maybe not stones: These symptoms do not sound like they are gallstone related. Typically, pain related to gallstones is in the mid-right upper abdomen, and radiates to the back. Crampy in nature. Classically 30-60 minutes after eating, especially with fatty foods. Not every patient has the classic symptoms however. Best to discuss with a general surgeon with experience in laparoscopic surgery. Hope this helps!