Frequent belching (with a shoulder "twinge") may be due to:
- Helycobacter pylori infection of the stomach (nausea, early satiety, belching, upper abdominal bloating). Dx is with breath test.
- Slow stomach emptying from various reasons: hypothyroidism, impared nerves in long term diabetes, obstruction of the stomach exit (fibrosis due to an ulcer in this area). Dx is with stomach emptying test.
- Small intestinal bacterial overgrowth (SIBO). This would probably appear with bloating, diarrhea or constipation. Dx is with a breath test.
Bloated stomach or a part of intestine may press upon the diaphragm what could cause left shoulder pain.
If you also have right upper abdominal pain..it could be the gallbladder.
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