Return of stomach contents to the mouth

Regurgitation is the return of stomach contents to the mouth. It usually occurs after a meal or during sleep. It can be accompanied by a sour taste, a feeling of fullness, or nausea. It may start as a feeling of heartburn or burning in the chest, and can progress to vomiting. Regurgitation can be caused by a variety of factors, including acid reflux, GERD, gastroparesis, or a hiatal hernia. It is important to consult a doctor if regurgitation occurs frequently to determine the underlying cause.