Is sleeping on your right side really harmful?
Over the years, various health experts have debated the effects of sleeping on the right side of the body. Although there is still no conclusive scientific basis, some studies and clinical observations have identified potential negative consequences associated with this position.
Among the most popular theories is that sleeping on your right side could impair blood flow to the heart, especially in people with cardiovascular conditions. Furthermore, it’s believed that this position can put pressure on certain organs and affect digestive processes during the night.

Comparison: right side vs. left side
Sleep on your right side
Although this position may be comfortable for many, especially after a heavy meal, it has certain disadvantages that are worth considering:
- Mild cardiovascular risk: Some experts argue that sleeping on your right side can interfere with venous return to the heart, hindering the efficient functioning of the circulatory system.
- Digestive problems: Lying on your right side can promote acid reflux and heartburn, as the esophageal sphincter is positioned to facilitate the return of gastric juices to the esophagus.
- Pressure on internal organs: This posture can put pressure on organs such as the liver or lungs, affecting their function if maintained for many hours.
Sleeping on your left side
In contrast, resting on the left side appears to offer significant health benefits, including:
- Improves blood circulation: Relieves pressure on the inferior vena cava, which promotes blood return to the heart.
- Facilitates digestion: The stomach and pancreas are in a more natural position, allowing for more efficient digestion during sleep.
- Reduces gastric reflux: This position prevents stomach acids from rising into the esophagus, improving sleep quality in people with heartburn problems.
Which position is best for you?
The ideal sleeping position can vary from person to person, depending on their health, habits, and comfort level. However, if you experience frequent digestive problems, acid reflux, or cardiovascular conditions, you may benefit from adopting the habit of sleeping on your left side.
Conclusion
Sleeping on your right side isn’t always the best option, especially considering the potential effects on cardiovascular and digestive health. Choosing to rest on your left side can significantly improve sleep quality and overall well-being. Changing this simple habit could make a big difference to your long-term health.