Gastroesophageal Reflux Disease occurs when the lower esophageal sphincter (a fancy name for the muscular valve that acts as an entry gate to your stomach) opens too frequently or does not close tightly enough, resulting in the "reflux" of stomach contents into the esophagus. This acid reflux causes irritation of the esophagus, creating a burning sensation often referred to as "heartburn." Heartburn is the most frequent symptom of GERD.There are many potential causes of GERD, including:

Physical abnormalities, such as hiatal hernia

Obesity

Smoking

Pregnancy

Diet

If you have symptoms of GERD, it's important to see your doctor so that the cause and appropriate treatment can be determined. Some diet and lifestyle tips which might help include:

Avoid foods or beverages which worsen reflux. Common offenders include caffeine, alcohol, fatty or fried foods, spicy foods, citrus, chocolate, or tomato-based foods

Eat small, frequent meals

Reach a healthy weight

Stop smoking

Wear loose-fitting clothing

Avoid lying down for 3 hours after eating

Elevate the upper body when sleeping