The ups and downs of heartburn

Heartburn. Is it serious? It might be. Heartburn is caused when acid in the stomach refluxes into the lower esophagus. The stomach has good protection against acid, but the esophagus doesn’t
https://idahostatejournal.com/news/local/the-ups-and-downs-of-heartburn/article_32d4ca94-6578-5429-9a0f-5e2530dd0c5f.html