Eat several small meals. Do not eat between meals. Doing so slows emptying of the stomach, and thereby increases HCl amounts in the stomach. Chew food slowly and properly. Also helpful are flax, German chamomile, licorice, catnip, bayberry, goldenseal, hops, valerian, and myrrh.
Exercise neutralizes stress.
Make sure the bowels move daily or take cleansing enemas. Do not take antacids or painkillers, such as aspirin. That only increases the problem. The calcium carbonate in the antacids doubles the amount of HCl production. Do not use medicinal drugs.