Answer by  
                                                                                          sapphire51 (1048)
                                                            
                          
                          
                                                          This is actually a very common anomaly and, quite often does not cause any discomfort or unusual
 symptoms.  If, however, the sphincter at the lower end of the esophagus becomes weakened, allowing
 some of the stomach acids and other contents to flow back into the esophagus, pain, burning sensaton result.