Left-side sleeping may also support circulation. Lying in this position can reduce pressure on major blood vessels, allowing blood to flow back to the heart more efficiently. Better circulation during sleep supports oxygen delivery and may help reduce swelling or discomfort, especially in people who spend long hours sitting or standing during the day.
The lymphatic system, which helps remove waste and supports immune function, may also work more effectively when the body is positioned comfortably. Sleeping on the left side can allow this system to drain more freely, supporting the body’s natural cleansing processes during rest.
