Swallowed air is the most common cause of burping. After you swallow air, your belly may feel full or bloated.

Less common causes of burping that occurs with abdominal fullness or indigestion include:

• An ulcer, which also can cause pain.
• Cancer of the stomach or esophagus, which also may cause nausea, decreased appetite, and fullness after eating.
• Gastroesophageal reflux disease (GERD), which causes burping and heartburn that is worse when you lie down or bend over.
• Gallbladder disease, which causes pain in the upper right abdomen that may spread to the back or shoulder.
• Heartburn, a vague discomfort in the upper abdomen or chest that may cause gas, a feeling of fullness, gnawing, or burning in the stomach. Burping may or may not accompany these symptoms.
• A gastric bezoar, an uncommon condition that occurs when a large collection of undigested material such as food, hair, or swallowed objects blocks the opening from the stomach into the intestine (gastric outlet obstruction).

Call your doctor for a checkup if you have burping with abdominal fullness or indigestion that does not get better or go away with home treatment.