heartburn
n.n. a burning feeling in your chest that happens when stomach acid moves up into your throat. It usually feels like a sharp pain or heat behind your breastbone.
n. a burning sensation in the chest caused by the reflux of gastric acid into the oesophagus. Often associated with gastroesophageal reflux disease (GERD) or the consumption of spicy or fatty foods.
I have a lot of heartburn after eating that spicy pizza.
The doctor suggested he avoid eating large meals late at night to prevent heartburn from waking him up.
While occasional heartburn is common and usually harmless, frequent episodes can indicate a more serious underlying condition that requires medical intervention.
From Middle English hertbryne, herte-bren (“lust", also "heartburn”, literally “heart burn”), equivalent to heart + burn. Compare also Middle English herte-brennyng (“anger, bitterness, heartburn”, literally “burning of/in the heart, heart-burning”). Compare also Ancient Greek καρδιαλγία (kardialgía), from καρδία (kardía, “heart”) + ἄλγος (álgos, “pain”). From being a burning sensation near the location of the heart in the chest.