Why You Should Avoid Sleeping on Your Right Side: How Your Sleeping Position May Affect Your Health

Experts explain how sleeping position may influence heart, digestion, and sleep.

Many people choose a sleeping position based solely on comfort. However, health experts say that the way you sleep may also influence your cardiovascular system, digestion, lymphatic circulation, and overall sleep quality. While no single sleeping position is ideal for everyone, growing evidence suggests that sleeping on the left side may provide several health benefits compared with sleeping on the right side.

Left-Side Sleeping May Reduce Pressure on the Heart

Some research suggests that sleeping on the right side may place additional strain on the cardiovascular system, particularly in people with existing heart disease. Because of the natural position of the heart and major blood vessels, sleeping on the left side may promote more efficient circulation and reduce the amount of work required by the heart.

Doctors note that some people with heart conditions report feeling more comfortable when sleeping on their left side.

For pregnant women, left-side sleeping is also commonly recommended because it helps reduce pressure on the inferior vena cava, supporting healthy blood flow to both mother and baby.

It May Help Reduce Acid Reflux

According to the article, body position can influence stomach acid movement.

When lying on the right side, the stomach sits above the esophagus, making it easier for stomach acid to flow backward. This may worsen symptoms of gastroesophageal reflux (GERD) in susceptible individuals.

Sleeping on the left side, however, may help keep stomach acid lower, reducing reflux episodes and minimizing irritation of the esophagus.

Some people with digestive disorders also report feeling more comfortable sleeping on their left side because it may help food move more naturally through the digestive tract.

Benefits for the Lymphatic System and Liver

The lymphatic system plays an essential role in removing metabolic waste and toxins from the body.

The article explains that many major lymphatic structures drain toward the left side of the body. Sleeping on the left side may therefore support normal lymphatic drainage and help waste products move more efficiently through the thoracic duct.

Some researchers also suggest that the liver may function more efficiently when it is subjected to less pressure during left-side sleeping, although more research is still needed in this area.

Better Sleep Quality

Sleeping position may also influence sleep quality.

According to the article, sleeping on the right side may contribute to more frequent awakenings in some individuals because of increased strain on the circulatory, digestive, and lymphatic systems.

People who switch to sleeping on their left side sometimes report deeper sleep, fewer interruptions during the night, and feeling more refreshed in the morning.

For people with sleep apnea or chronic snoring, changing sleeping position may also improve airflow and reduce nighttime breathing interruptions.

The Best Sleeping Position Depends on the Individual

Experts emphasize that no single sleeping position is perfect for everyone. People with certain medical conditions, shoulder pain, injuries, or other health concerns may require different sleeping positions based on medical advice.

However, for many healthy adults, sleeping on the left side may offer potential benefits for heart health, digestion, circulation, and sleep quality. If changing your sleeping position improves your comfort and rest without causing pain, it may be worth making it part of your nightly routine.