I have chronic pelvic pain & lately I've been seeing blood in my stool. Could it be endometriosis complications? Can pelvic u.s show adhesions on colon?

See below. Blood in your stool is most likely hemorrhoids or a problem in the colon. You should report this to your doctor ASAP. Endometriosis doesn't usually cause blood in the colon. Ultrasound is not a good imaging modality to see adhesions on the colon. Best wishes!