Sleeping on your right side can worsen heartburn and acid reflux by allowing stomach acid to flow back into the esophagus, especially in people with GERD or pregnancy. It may also increase heart strain as the heart works harder against gravity, and impair digestion and lymphatic drainage. Sleeping on the left side is generally healthier for heart and digestive function.

Sleeping on your right side can worsen heartburn and acid reflux by allowing stomach acid to flow back into the esophagus, especially in people with GERD or pregnancy. It may also increase heart strain as the heart works harder against gravity, and impair digestion and lymphatic drainage. Sleeping on the left side is generally healthier for heart and digestive function.