Heartburn is a sensation characterized by a burning discomfort or pain in the chest area, often behind the breastbone. It's typically caused by stomach acid refluxing back into the esophagus, leading to irritation and inflammation. Here's a breakdown of what does heartburn feel like:

1. Burning Sensation: The hallmark of heartburn is a burning feeling in the chest. It's often described as a fiery or burning pain that can radiate upward toward the throat.
2. Location: Heartburn usually occurs in the chest, just behind the breastbone. However, it can also manifest in the throat or even the jaw.
3. Worsening with Certain Actions: Symptoms of heartburn may worsen after eating a large meal, lying down, or bending over. These movements can exacerbate the reflux of stomach acid into the esophagus.
4. Acidic Taste in the Mouth: Some individuals with heartburn may experience a sour or acidic taste in their mouth, especially when lying down.
5. Discomfort After Eating: Heartburn often occurs after consuming certain foods or beverages, such as spicy foods, citrus fruits, chocolate, caffeine, or alcohol.
6. Relief with Antacids: Taking antacids or other over-the-counter medications designed to neutralize stomach acid can provide relief from heartburn symptoms.
7. Chronic Symptoms: While occasional heartburn is common and usually harmless, chronic or severe heartburn may indicate gastroesophageal reflux disease (GERD), which can lead to complications if left untreated.

It's essential to note that while heartburn shares similarities with other conditions like a heart attack, it typically does not involve the sharp, stabbing pain associated with cardiac issues. However, if you're experiencing chest pain and are unsure of the cause, it's always best to seek medical attention promptly.