Anonymole – apocryphal agitators

Question: Is ancient times side-sickness or Appendicitis potentially caused by the grit from the milling of grain? Millstones of old undoubtedly shed part of themselves into the flours that all people would come to eat in the form of breads and gruels. Would these tiny grains of sand, some not so tiny, end up blocking that useless organ the appendix and thereby causing side-sickness?