Neurological
|
January 15, 2024

What is Restless Leg Syndrome: Uncovering the Causes and Risk Factors

Written By
Brittney Bertagna RN
Medically Reviewed by
Dr. Jessica Christie ND, CNS
Updated On
January 14, 2025

Have you ever experienced an overwhelming urge to move your legs, accompanied by uncomfortable sensations that disrupt your sleep and leave you feeling restless? If so, you may be familiar with restless leg syndrome, a neurological disorder that affects millions of people worldwide. But what exactly contributes to this condition, and what are the risk factors associated with it? In this article, we will explore restless leg syndrome, discussing its potential causes and risk factors to provide you with a better understanding of this condition.

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What is Restless Leg Syndrome?

Restless leg syndrome (RLS), also known as Willis-Ekbom disease, is a neurological disorder that affects the legs and disrupts sleep. It is characterized by uncomfortable sensations in the legs and an irresistible urge to move them, especially during rest or inactivity, particularly in the evening or at night.

RLS is considered both a sleep disorder and a movement disorder, as it primarily occurs during periods of rest or inactivity, leading to disrupted sleep patterns. The symptoms of RLS can cause significant distress and impairment in daily activities, energy levels, mood, and social functioning.

Functional medicine takes a holistic approach to managing RLS. Instead of solely focusing on symptoms, functional medicine aims to identify and address factors that may contribute to the condition, with the goal of providing symptomatic relief and improving overall quality of life.

When it comes to managing RLS, functional medicine practitioners consider various factors that may contribute to the condition and disrupt sleep. This may involve evaluating nutrient levels, such as iron, which is often associated with RLS. Lifestyle modifications, such as regular exercise, maintaining a healthy sleep routine, and avoiding triggers like caffeine and alcohol, may also be suggested to help alleviate symptoms and improve sleep quality.

What Causes Restless Leg Syndrome?

Restless leg syndrome can be classified into two types: primary RLS and secondary RLS. While the exact causes of RLS are not fully understood, research suggests that genetic and environmental factors may play a role in its development.

Primary RLS refers to cases where the disorder occurs without any underlying medical condition or factor. The exact genetic basis of primary RLS is not fully understood, but studies have shown a familial tendency, suggesting an autosomal dominant pattern of inheritance in up to 75% of patients. Variants of the PPRD, BTBD9, and MEIS1 genes, which are involved in nervous system signaling and functioning, have been associated with the risk of primary RLS.

Secondary RLS, on the other hand, is RLS that occurs as a result of another underlying disease or factor. Several medical conditions have been associated with secondary RLS, including depression, diabetes, fibromyalgia, hypothyroidism, iron deficiency (with or without anemia), kidney failure, Parkinson's disease, peripheral neuropathy, pregnancy, and rheumatoid arthritis. Certain medications, such as antipsychotics, antidepressants, and antinausea drugs, can also be linked to RLS symptoms.

Understanding Risk Factors of Restless Leg Syndrome

The exact cause of RLS is still not fully understood, several risk factors have been associated with its development. It is important to note that while these risk factors may increase the likelihood of developing RLS, they do not guarantee its occurrence. RLS can still develop in individuals without these risk factors, and not all individuals with these risk factors will develop RLS.

Several risk factors have been associated with the development of RLS. These include:

Gender: Women are more commonly affected by RLS than men.

Age: The risk of developing RLS may increase with age. 

Genetic Factors: Several genes have been associated with an increased risk of developing RLS. These genes play a role in nervous system signaling and functioning. As previously mentioned, the PPRD, BTBD9, and MEIS1 genes have been identified as particularly relevant in the context of RLS risk. Additionally, variants or abnormalities in these genes can contribute to the development of RLS.

The Functional Medicine Perspective on Restless Leg Syndrome

A functional medicine perspective on addressing RLS involves a comprehensive approach that aims to identify and address factors contributing to the development of the condition, rather than simply managing symptoms.

Functional medicine practitioners recognize that RLS can have various contributing factors, including genetic predisposition, nutrient levels, neurotransmitter imbalances, and gastrointestinal disorders. By understanding the interplay of genetics, lifestyle, environment, and biochemical factors, functional medicine offers a comprehensive strategy to help manage RLS.

Incorporating functional medicine lab testing can provide valuable insights into the factors associated with RLS and guide personalized recommendations. There are a number of functional medicine lab tests that practitioners can consider when evaluating patients with RLS.

Anemia Panel 

Anemia has been associated with RLS. A Complete Blood Count, like the one offered by Access Med Labs, can provide a comprehensive picture of iron status, metabolism, and distribution throughout the body.

Micronutrients Testing

Micronutrient testing, like the Micronutrient Test by SpectraCell Laboratories, can help identify any excesses or deficiencies of trace nutrients and vitamins that have been associated with RLS, such as vitamin D, C, and E. 

Comprehensive Metabolic Panel 

This Comprehensive Metabolic Panel by Access Med Labs, measures various biomarkers that may be helpful in identifying conditions like diabetes, kidney disease, and electrolyte imbalance. Identifying and addressing these underlying medical conditions can potentially help manage RLS symptoms.

Gut Health Testing 

Emerging research suggests a connection between RLS and gastrointestinal disorders. Testing for conditions like irritable bowel syndrome (IBS), celiac disease, small intestinal bacterial overgrowth (SIBO), and Crohn's disease may provide insights into the gut-brain axis and guide potential options for management.

This Celiac, IBS, and Crohn’s Assay (CICA) test is offered by Cell Science Systems and can test for markers of these gastrointestinal disorders. 

Additionally, this SIBO 3-Hour Breath Test by Genova Diagnostics can assess for SIBO. 

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How To Decrease Your Risk of Developing Restless Leg Syndrome

Personalized interventions play a key role in functional medicine. By optimizing nutrient levels, you can support the body's natural functions and maintain balance in the system. For example, iron supplementation has shown potential improvements in RLS symptoms, even in patients with normal serum iron levels but low ferritin levels. 

Additionally, vitamin D levels have been associated with RLS, and increasing vitamin D levels may support dopamine-producing neurons and improve symptoms. Supplementation with vitamins C and E has also shown potential in reducing RLS symptoms.

Lifestyle modifications are another important aspect of functional medicine. Avoiding or reducing the consumption of alcohol, nicotine, and caffeine can help manage RLS symptoms. Regular exercise, including aerobic and leg-stretching exercises, has also been found to provide relief for individuals with RLS. Furthermore, relaxation techniques such as leg massages and warm baths can help relax the muscles and alleviate discomfort associated with RLS.

A comprehensive approach to managing restless leg syndrome involves a combination of medical testing, personalized interventions, and lifestyle modifications. By addressing underlying medical conditions, optimizing nutrient levels, and making necessary lifestyle changes, individuals with RLS can potentially experience improvements in their symptoms and overall quality of life. It is important to consult with a healthcare professional to develop a tailored plan that suits individual needs.

The information in this article is designed for educational purposes only and is not intended to be a substitute for informed medical advice or care. This information should not be used to diagnose or treat any health problems or illnesses without consulting a doctor. Consult with a health care practitioner before relying on any information in this article or on this website.

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Lab Tests in This Article

Cloyd, Dr. J. (2023a, May 4). A Functional Medicine SIBO Protocol: Testing and Treatment. Rupa Health. https://www.rupahealth.com/post/a-functional-medicine-sibo-protocol

Cloyd, Dr. J. (2023b, August 14). Top Labs To Run Bi-Annually On Your Patients Who Suffer From Restless Legs Syndrome. Rupa Health. https://www.rupahealth.com/post/top-labs-to-run-bi-annually-on-your-patients-who-suffer-from-restless-legs-syndrome

Cloyd, Dr. J. (2023c, September 11). A Root Cause Medicine Protocol For Patients With Restless Legs Syndrome (RLS): Testing, Therapeutic Diet, and Supportive Supplements. Rupa Health. https://www.rupahealth.com/post/a-root-cause-medicine-protocol-for-patients-with-restless-legs-syndrome-rls-testing-therapeutic-diet-and-supportive-supplements

Deporto, Dr. T. (2022, November 30). 4 Vitamins That May Help Relieve Restless Leg Syndrome. Rupa Health. https://www.rupahealth.com/post/restless-leg-syndrome-causes-symptoms-and-treatment

Diorio, Dr. B. (2023, January 17). Why Most Functional Medicine Practitioners Say No To Alcohol. Rupa Health. https://www.rupahealth.com/post/why-most-functional-medicine-practitioners-say-no-to-alcohol

Greenan, Dr. S. (2021, November 5). A Functional Medicine Approach To IBS. Rupa Health. https://www.rupahealth.com/post/a-functional-medicine-approach-to-ibs

Maholy, Dr. N. (2023, March 9). Integrative Medicine Protocol For Reversing Type 2 Diabetes. Rupa Health. https://www.rupahealth.com/post/integrative-medicine-protocol-for-reversing-type-2-diabetes

Restless Legs Syndrome | National Institute of Neurological Disorders and Stroke. (n.d.). Www.ninds.nih.gov. https://www.ninds.nih.gov/health-information/disorders/restless-legs-syndrome

Sweetnich, Dr. J. (2023, May 9). How to Make Sure Your Patients Are Getting Enough Vitamin C in Their Diet: Understanding Testing, RDAs, and The Benefits of Supplementation. Rupa Health. https://www.rupahealth.com/post/vitamin-c-101

Sweetnich, J. (2023, May 4). Getting to Know Vitamin D: From Testing to Supplementing and Meeting your RDA’s. Rupa Health. https://www.rupahealth.com/post/vitamin-d-101-testing-rdas-and-supplementing

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Weinberg, Dr. J. (2022, April 14). 4 Lifestyle Changes That Help Manage Crohn’s Disease. Rupa Health. https://www.rupahealth.com/post/a-functional-medicine-approach-to-crohns-disease

Weinberg, Dr. J. (2023, December 19). The Science of Sleep: Functional Medicine for Restorative Sleep. Rupa Health. https://www.rupahealth.com/post/the-science-of-sleep-functional-medicine-for-restorative-sleep

Yoshimura, H. (2023, November 7). The Remarkable Power of Exercise on Our Health: A Comprehensive Overview. Rupa Health. https://www.rupahealth.com/post/the-remarkable-power-of-exercise-on-our-health-a-comprehensive-overview

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