The position you sleep in may seem like a small personal preference, but it can influence digestion, breathing, comfort, circulation, and sleep quality.
Among the different sleeping positions, lying on the left side has attracted particular attention. Some research suggests that left-side sleeping may be helpful for people who experience acid reflux, while certain positions can also be more comfortable during pregnancy or for people with specific medical conditions.
At the same time, many claims online go much further, suggesting that sleeping on your left side can “cleanse the brain,” dramatically improve heart function, or prevent serious diseases.
The reality is more nuanced.
Sleeping on your left side can have some potential advantages, but it isn’t universally better for everyone. Your health conditions, body shape, pregnancy status, sleep apnea, musculoskeletal comfort, and personal preference all matter.
Here’s what you should know.
5 tư thế ngủ hữu ích mà nhiều người không biết
1. Left-Side Sleeping May Help With Acid Reflux
One of the best-supported potential benefits of sleeping on your left side involves gastroesophageal reflux disease (GERD).
When you lie down, stomach contents can move toward the esophagus more easily. This can cause:
Heartburn
Acid taste in the mouth
Regurgitation
Chest discomfort
Nighttime coughing
Difficulty sleeping
Body position can influence how easily stomach acid moves upward.
