A painful burning sensation produced in the chest cavity usually associated with the back flush of acidic chyme into the esophagus is__________? August 9, 2021May 11, 2018 by admin A painful burning sensation produced in the chest cavity usually associated with the back flush of acidic chyme into the esophagus is__________? A. Pyrolysis B. Pyrosis C. Peristalsis D. Dyspepsia