Your stomach is positioned slightly toward the left side of your body.
When you lie on your right side, gravity may cause stomach acid to move differently compared to lying on your left.
For people prone to:
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Acid reflux
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Heartburn
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GERD symptoms
Right-side sleeping can sometimes make symptoms feel stronger.
That doesn’t mean everyone will experience issues — but if you notice nighttime heartburn, your sleeping side could be contributing.
Heart Position and Circulation
Your heart sits slightly left of center in your chest.
Some sleep experts suggest that lying on the left side may reduce pressure on the heart, especially for people with certain cardiovascular conditions.
Sleeping on the right side generally isn’t harmful for healthy individuals, but those with specific heart concerns sometimes report more comfort on the left.
Again — this varies from person to person.
Lymphatic Drainage and Detox Myths
You may have heard bold claims online saying:
“Sleeping on your right side blocks detox!”
There is no strong scientific evidence that right-side sleeping prevents the body from “detoxing.” Your liver and kidneys function regardless of sleep position.
However, body orientation can slightly influence how fluids move overnight — especially if someone has swelling issues.
But for most healthy adults, this is not a major concern.
Spinal Alignment Is the Bigger Issue