heartburn

noun

1. (countable, uncountable)A burning pain in the chest that is caused by stomach acid entering the gullet.

   “Coordinate term: cardiodynia”

2. (countable, figuratively, uncountable)annoyance, heartache, or similar feelings.

   “”There’s some heartburn about the fact the message is getting stepped on,” said Mark McKinnon, Bush’s campaign media strategist.”

   “America’s policy of containing both the Soviet Union and its Chinese ally did cause some heartburn in Tokyo.”

   “"It boils down to promises made, promises kept," said Mr. White, 53. "And that's really what I have heartburn about."”

   “Back in Thailand, meantime, the CIA felt relatively little heartburn over the congressional rebuff.”