Your lower esophageal sphincter (LES) is a muscular ring that connects your esophagus with your stomach. It relaxes to let food pass through but otherwise stays closed to prevent stomach acid from ...

NEW YORK (Reuters Health) - Stomach acid reflux or heartburn may be a particular problem for people with breathing problems such as emphysema or bronchitis, known generally as chronic obstructive ...

Acid reflux is a very common (but also often very annoying or distressing) medical problem that can make your life miserable at times. It may make it feel like your heart or stomach is literally on ...

Heart attack symptoms, however, present differently. Patients experiencing a heart attack often describe tightness in the ...