How did brigham young break his appendix?

Answer 1

Brigham Young did not do anything to rupture his appendix. Appendicitis (which causes a ruptured appendix if left untreated) can be caused by several things which happen naturally in the body, most often something you ate getting stuck and causing infection.

Answer 2

Brigham Young died from Acute Appendicitis and Peritonitis. This means that he did not break his appendix (which is impossible) but that he had an inflammed appendix which burst. The bacteria from the burst appendix then spilled into the abdominal cavity and caused a huge internal infection. To this day people die from this and the causes of appendicitis are still unknown.