Strange feeling left abdomen under rib, no pain/marks. also very small amt bright red blood outside stool, and anal sting. poss causes? 34 f. no hx ca

LUQ anatomy: Anatomically, the left upper quadrant (luq) of abdomen includes: spleen, pancreatic tail, stomach, descending duodenum, splenic flexure of the colon, associated vessels. Don't forget the diaphragm, heart, & lower chest are pretty close by. The abdominal musculature, ribs, & skin can all contribute as well to localizing luq pain. Get examined now please for clarity of diagnosis esp. if seeing blood