Whenever I have some stomach related problems I always rely on one single medicine.which has relieved me from stomach ache and acidity and other stomach related issues.
the medicine is a very simple remedy.just crush some ginger and take out the juice add some salt and drink it.
its that simple and other best thing is take two pieces of garlic and swallow them even though ur mouth may stink for sometime its truly a best remedy from my experience
but these remedies may work in certain cases like stomach ache caused due to indigestion etc.
if u find the stomach ache still exists plz do consult ur doctor for more advice
wish u good health all
regards
praveen