Yes, I had onset of burping a few days after darkening of urine which was my initial symptom. The burping occurred in conjunction with eating. The tumor in the head of the pancreas was compressing my bile duct and that resulted in not having enough bile available for digestion. The tumor may also have interfered with an adequate amount of digestive enzymes. With incomplete digestion, food was fermenting as it mixed with bacteria in GI tract causing bloating. I had to burp frequently to get relief from the bloating in the stomach.