My mother is 90 and sharp as a tack. She s been in good health up until a few weeks ago when she was eventually diagnosed with gallstones. Today she s been having severe pain in her rectum. She s gone to a local clinic and plans to see her regular doctor tomorrow. The clinic doctor told her there was nothing unusual he could feel or notice up there. Could she be passing a gallstone? I ve tried to find out if and how they re passed at various medical sites and have seen nothing. Can you help?