I do not know about stomach acidity, though ginger
is a traditional remedy for nausea. However,
ginger thins the blood. A small amount will actively
thin blood for several days. As a consequence, it
is a good idea to avoid ginger a week before surgery.
Ginger is reported to help avoid blood clots,
possibly minimizing possibility of strokes. I once
ate a great deal of crystallized ginger and little
blood spots showed under my skin on my shoulders and
arms, lasted for several hours. Don't make
that mistake!!!!!