lymphatic system

Lymphatic System

A key player in immunity, detoxification and overall health!

The lymphatic system is one that is regularly overlooked when it comes to health. Comprised of a complex interrelated network of vessels and lymph nodes as extensive as the cardiovascular system, the lymphatic system is vital in maintaining our life force. The lymphatic system also includes the organs of the spleen and thymus gland as well as the tonsils and adenoids – highlighting its importance in immune function as well.

The lymph and its special role in regulating an entire host of functions, has historically held great importance in cross cultural medicinal traditions. Hippocrates, the father of both western and herbal medicine, was the first ever to document what we now know as the lymphatic system in the Hippocratic treatise ‘On Glands’or Peri adenon.  Since ancient times our knowledge of the lymphatic system has deepened although much of our understanding remains the same. Hippocrates postulated that lymph glands both attracted and received fluid and that the fluid or moisture in the body caused these lymph nodes to become overfilled in times of illness and imbalance. Contrast this to our current understanding and it is clear that not much has changed. Our current understanding of the lymphatic system’s role, though much more detailed than what Hippocrates first proposed, includes fluid regulation, waste removal and filtration and immunity.

 

Fluid Return

Our lymphatic system is the little brother to our cardiovascular system. Our heart and blood vessels work hard to deliver much-needed nutrients and oxygen around our body. Due to complicated reasons, the exchange of blood that happens at our tissues results in a little more fluid being given to our cells than received back by our blood vessels. This difference in fluid is where the lymphatic system comes in. The lymphatic vessels collect this extra cellular fluid and return it to the heart via a complex network of vessels and lymph nodes.

Without a proper functioning lymphatic system, fluid accumulates resulting in swelling and oedema. In naturopathic philosophy there are certain constitutions that are more prone to lymphatic congestion. If you find you are prone to swollen lymph nodes and oedema there are certain things that can be done to support your lymphatic system.  However, please note that if you are experiencing oedema of any kind it is best to talk to your medical practitioner to rule out any serious health conditions.

As the lymphatic system is comprised of vessels that run towards the heart, for most of the time the flow of lymph is fighting against gravity. Unlike the blood vessels that are aided by the strong muscular force of the heart beat to transport blood, the lymphatic vessels rely on a more passive process of muscular contractions to help direct the flow. This is why lymphatic swelling is usually located in the lower limbs – it is hard work moving against the downward forces of gravity. Manual manipulation can be used in cases of insufficient lymph flow to support the return of fluid back to the cardiovascular system. As the lymph vessels are located superficially – quite close to the skin surface, gentle pressure is best. Ways to support the lymph flow manually include a specific type of massage, known as lymphatic drainage massage, usually perfomed by a remedial masseuse or alternatively dry skin brushing that you can do yourself.

Dry skin brushing is a traditional technique used and recommended by natural health practitioners to encourage the drainage of lymphatic vessels. It involves applying a light amount of pressure to the skin using a soft-bristled brush in long stroke motions towards the heart. (NB: we sell these dry skin brushes over the counter at Noosa Holistic Health).

Another lifestyle recommendation that has been shown to improve lymphatic flow is movement. As mentioned above, muscular contraction aids the flow of lymph, so a sedentary lifestyle can aggravate lymph congestion. Whereas engaging in mild to moderate exercise – including simple walking and yoga, causes the muscles surrounding lymph tissue to contract helping to push the lymphatic fluid towards the heart thereby promoting clearance. Rebounding, which involves bouncing on a mini trampoline, is an excellent exercise to promote lymphatic flow as the gentle movements work against gravity.

There are certain herbal remedies with an affinity for the lymphatic system and fluid balance, such as dandelion leaf, calendula, red root, violet and cleavers. Incorporating herbal teas into your diet and ensuring you are drinking enough water are gentle ways of supporting lymphatic flow. For a more tailored and therapeutic approach consulting a naturopathic physician may be more appropriate for longstanding lymphatic congestion. 

 Immunity & Toxin Clearance

Lymph nodes are bean-shaped organs situated along the lymphatic vessels. There are approximately 500 lymph nodes within our bodies ranging in size from 1mm to 4cm. Their job is to filter unwanted pathogens such as bacteria and viruses from the blood and toxins from the environment. Sometimes lymph nodes become overwhelmed from the pathogens they are trying to destroy or the toxins they are trying to clear. High levels of bacteria or viruses might get trapped in the node, but due to an insufficient immune response these pathogens are not dealt with effectively. Likewise, if we are exposed to a higher burden of pollution or toxins, there may be a localized swelling as the toxins are cleared.  Both of these issues can result in lymph node swelling. Painful lymph nodes usually occur during infection whereas lymph node swelling not associated with pain or tenderness can be a sign of certain types of cancers. In cases of chronic lymph node swelling not associated with infection, it is best to consult your doctor for further investigations.

As the lymphatic system is so intrinsically linked to our immunity it is important to not only support the flow of lymph but also the immune system when addressing lymphatic congestion. It should come as no surprise that eating foods high in antioxidants and fibre supports your immune system. When fighting infection both the immune system and the bacteria and viruses themselves can produce chemicals and toxins that promote inflammation. Antioxidants help reduce this inflammation and promote healing. Usually most people think of fibre for improving gut function and regulating bowel motions. In addition to these actions, fibre also provides our healthy gut microbes with food. About 80% of our immune system resides in our gut and is influenced by the microbes that inhabit our colon. Supporting a healthy microbiome (the collective term for our friendly inhabitants) also supports a healthy immune system.

Given our current lives, most of us do not get enough sunlight to support the production of vitamin D. Vitamin D plays an important role in regulating our immune system and there are other important health benefits from exposure to natural sun light and full spectrum light. An article detailing the importance of sunlight exposure and vitamin D can be found here.

So all in all, a healthy diet, fresh air, regular exercise and keeping hydrated with pure water, will go a long way to support our lymphatic system – one of our most important, but often overlooked pathways of detoxification and immune function. If extra support could be beneficial for you to promote specific aspects of immunity or detoxification, then consider a tailored approach of herbs and nutrients to optimise your lymphatic system by seeing Karen for an appointment.

 

 

 

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