heartburn, gastritis, ulcers. stomach trouble

acid acidity anatomical anatomy bacteria bile bloating bowel burning chronic colon concept dehydration discomfort disease diseases dyskinesia esophagus formation full gas gases gastric gastritis health heartburn hydrochloric illustration infection inflammation infographics irritant isolated juice malaise medicine microbes mucosa organ pain pancreatitis pathology patient people poster process reaction reflux sensation sphincter stomach strong suffering toxins trauma trouble ulcer ulcers vector viral visualization