(REUTERS) — President Barack Obama, who had medical tests on Saturday after complaining of a sore throat, is suffering from acid reflux, the president’s physician said.

“The president’s symptoms are consistent with soft tissue inflammation related to acid reflux and will be treated accordingly,” Obama’s doctor, Captain Ronny Jackson, said in a statement.

Acid reflux is a condition in which the stomach contents flow back up from the stomach into the esophagus, causing such symptoms as heartburn and sore throat.

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