Have you ever wondered to what extent the two sides of your body mirror each other?
It is very common for a patient to say that they have all their issues on just one side of the body. A pain in the left foot, a bad left hip, a bad left shoulder, left-sided abdominal pain, a pain in the neck on the right side; why?
Why do rashes choose the left or right side of the body? Why does the acuity of the eyes differ so greatly from one to the other? Why do we get pains often on just one side of the body?
Reasons to Try Sleeping on Your Left Side:
The Lymph Drains toward the Left
Interestingly, the left side of the body is the dominant lymphatic side. The majority of the body’s lymph fluid drains into the thoracic duct, located on the left side. Along the way, lymph fluid carrying proteins, glucose and other metabolites and waste products is purified by lymph nodes and is then drained into the left side of the heart.
Because of this, it is common to deduce that left side ailments may be due to chronic lymphatic congestion. When the lymphatic system congests, it is more likely that lymph will back up on the left, more lymph-dominant side of the body. Whether or not this is always true is debatable, but you can see the logic at play here.
In the same non-scientific vein, issues that show up on the right side are thought to be due to imbalances in the liver and blood. Since the liver is on the right side of the body, liver congestion will more easily back up into the right side of the body and potentially cause problems.
The Priority System of the Body
Congestion happens in the body according to a certain pattern, or priority system. In this priority system, the lymph is the body’s first detox system to congest, before the liver and blood become overwhelmed. Thus, early lymph issues may present more on the left side of the body and move to the right as they become more long-standing and begin to congest the liver and the blood, at which point symptoms may start to show up on the right side of the body.
The Magic of Sleeping on the Left Side
The small intestine dumps waste through the ileocecal valve (ICV) on the right side of the body into the beginning of the large intestine. The large intestine travels up the right side of your belly the across the tummy, where it dumps waste into the descending colon on the left side.
Sleeping on the left side allows gravity to encourage the food waste to move more easily from the small intestine into the large intestine through the ICV.
As the night wears on and you continue to sleep on your left side, the waste moves more easily into the descending colon. With the help of gravity and a good night’s sleep on the left the side, the descending colon is full of waste to easily eliminate completely each morning.
Better Heart Function
Of course, one of the biggest players on the left side is the heart. It makes sense that if you sleep on your left side, the lymph drainage toward the heart will again be helped by gravity, taking some of the workload off the heart as you sleep.
The aorta, which is the biggest artery in the body, leaves the top of the heart and arches to the left before it heads down into the abdomen. By sleeping on the left side, the heart is pumping its biggest payload downhill into the descending aorta.
Sleeping on the left also allows much of the intestines to hang away from the very thin-walled inferior vena cava (IVC) which brings venous blood back toward the heart. Interestingly, the IVC lies against the right side of the spine, so when you lie on the left much of the viscera falls away from the IVC. Here again, gravity is just making the heart’s job a little easier.
The Spleen Is On the Left
The spleen, which is part of the lymphatic system, is also on the left. The spleen is much like a gigantic lymph node, except that in addition to filtering lymph it also filters blood. When you lay on the left side, drainage back to the spleen is once again helped and made easier by gravity.
Remember, the lymph system drains all the cells in the body via movement and muscular contractions, rather than being pumped by the heart. Helping the lymph to drain to the spleen and heart with gravity is a good thing.