Heartburn (noun)

Heartburn is a burning sensation in the chest caused by stomach acid rising up into the esophagus.

Origin:

Heartburn is a condition in which a person experiences a burning sensation in the chest, typically just behind the breastbone. this discomfort may extend upwards into the throat.

Examples:

1. I have heartburn after eating spicy food.
2. After drinking coffee, I have heartburn. .
3. I take medicine for heartburn.
4. I suffered from heartburn for months.
5. The baby had heartburn after drinking milk.