I'd start seeking first clues in bad diet (including that milk-will-help hoax) and checking if throat/stomach closes properly, but filter couldn't hurt.
Discussion
Agree, check your diet for sure. I tried everything.. stopped milk, coffee, tea, all alcohol, processed and acidic foods.. I was even eating umeboshi plums for alkaline..
Regardless, people shouldn’t be drinking water straight from the tap, that crap is nasty..
