Hypergastrinemia is a medical condition characterized by an excessive level of the hormone gastrin in the blood. Gastrin is produced by the stomach and plays a crucial role in stimulating the production of stomach acid, which helps in digestion. When gastrin levels are too high, it can lead to various digestive issues, including ulcers and acid reflux. The causes of hypergastrinemia can vary, but it is often linked to conditions like Zollinger-Ellison syndrome, where tumors in the pancreas or duodenum produce excess gastrin. Other factors, such as chronic gastritis or the use of certain medications, can also contribute to elevated gastrin levels.