Heartburn and Acid Reflux

I have extremely bad heartburn and I can't quite figure out what it is that is making me have such bad heartburn. I take Tums, and it helps immensely, but what is causing it? What other foods should I avoid for heartburn?

Heartburn is listed as a side effect of the medication Levoquin. This medication is an antibiotic which is used to treat serious bacterial infections. The online health community Medhelp.org contains quite a number of comments from Levoquin users about heartburn. However it it often a case of the vocal minority that expresses concern about side [...]