GERD, commonly known as acid reflux, is a medical condition characterized by the backflow of stomach acid into the esophagus, leading to symptoms such as heartburn, chest pain, and difficulty swallowing. Some synonyms for GERD include gastroesophageal reflux disease, acid regurgitation, and reflux esophagitis. Other possible terms include acidic taste in the mouth, indigestion, sour stomach, and heartburn. The condition affects many people, and it can be managed with lifestyle changes and medication. Some common triggers of GERD include caffeine, spicy or fatty foods, alcohol, and smoking. Anyone experiencing persistent or severe symptoms should seek medical attention to rule out underlying conditions and receive appropriate treatment.