10 root causes of fibromyalgia (# 3 is the thyroid)

You can not imagine how many readers approach me about chronic pain and fibromyalgia. If your doctor rejects the thyroid as a possible culprit of your pain, bring this article.

Written by Amy Myers, MD

It is estimated that fibromyalgia affects almost 6 million or 1 in 50 people. Fibromyalgia is classically characterized by chronic pain, in particular muscle pain, fatigue, sleep disorders, brain fog or cognitive decline, depression and painful spots throughout the body.

Conventional medicine has not yet discovered the cause of fibromyalgia and only offers the management of symptoms through pain medications and antidepressants.

Functional medicine, on the other hand, looks for the root cause of fibromyalgia and other chronic diseases, treating the problem at the root level, thus restoring the patient’s health. As a functional medicine doctor, I have helped many patients recover from fibromyalgia. Below are the ten main causes of fibromyalgia that I see in my clinic.

10 root causes of fibromyalgia

Gluten intolerance:

Gluten has been linked to more than 55 diseases and is often referred to as a “big masker”. The reason for this is that most of the symptoms of gluten intolerance are not digestive in nature, but rather neurological, such as pain, cognitive deterioration, sleep disorders, behavior problems, fatigue and depression.

Candida overgrowth:

Candida is a fungus or yeast, and a very small amount of it lives in your intestines. However, when it is produced in excess, candida breaks the wall of the intestines and enters the bloodstream, releasing toxic byproducts in your body, causing a series of unpleasant symptoms such as brain fog, fatigue, digestive problems and pain. Practically, each of my patients with fibromyalgia has grown excessively by Candida.


More than half of people with thyroid problems have no idea that they have one and 90% of them have hypothyroidism or an underactive thyroid gland. It is vital that your doctor check six different blood markers (TSH, free T4, free T3, inverse T3, thyroid peroxidase antibodies and thyroglobulin antibodies) to measure the function of the thyroid gland. It is imperative that your doctor use the optimal levels instead of the standard reference range when evaluating and diagnosing thyroid disorders. Putting my patient’s thyroid levels in an optimal range usually relieves fatigue, brain fog, sleep disorders and depression.

Vitamin deficiencies:

The deficiency of magnesium, vitamin D and vitamin B12 is the most common vitamin deficiency that I see in people who have been diagnosed with fibromyalgia. I have had several patients who completely reverse their fibromyalgia symptoms with magnesium alone. The best way to measure magnesium is a level of magnesium in red blood cells (RBC), which can be analyzed through any conventional laboratory.

Bacterial overgrowth in the small intestine (SIBO) and leaky gut:

There are more bacteria in us and in us there are our own cells. When these bacteria become unbalanced by the use of antibiotics or a sugar-rich diet, we may lose our ability to digest and absorb nutrients, especially B12. Gluten can cause SIBO and leaky gut and SIBO and leaky gut can lead to gluten and other food intolerances. It’s a catch-22 and a vicious circle. It must “fix the bowel” first in anyone with fibromyalgia or any chronic disease.

Adrenal fatigue:

Adrenal fatigue is a result of chronic stress, whether real or perceived. Chronic pain is a stress for the adrenal glands, although it is typically not the initial adrenal stressor. The initial stress factor is usually something like food intolerances, Candida, mercury toxicity, vitamin deficiencies or mycotoxins. My goal is to support the adrenal glands with adaptogenic herbs while we search for the root cause of stress and correct it.


Mycotoxins are very toxic substances produced by toxic molds. Only about 25% of the population leads to genes to be susceptible to the effects of mycotoxins.

Toxicity of mercury:

I recommend that all my patients find a biological dentist and that mercury amalgam fillings are eliminated. Mercury is toxic to our bodies and may be a piece of the puzzle for people with fibromyalgia and other chronic diseases such as chronic fatigue syndrome, autoimmune diseases, neurological disorders and cancer. Then I recommend the heavy metal test using a pre and post DMPS urine test test.

MTHFR mutations:

This is a genetic test that can be obtained through any conventional laboratory. The more mutations you have in the MTHFR gene, the less you will be able to methylate and detoxify particularly toxins such as mercury and lead. The more mutations you have in this gene, the higher your requirements for methyl-B6, methyl-B12 and folinic acid to keep your detoxification pathways working properly.

Glutathione deficiency

Glutathione, a molecule, is the most critical part of our body’s detoxification system. Glutathione is recycled in our body unless our toxic load is too high or we lack GSTM1 and GSTP1, the enzymes needed to recycle and produce glutathione. Taking glutathione or precursors (NAC, alpha lipoic acid, milk thistle) often helps my patients dramatically with fatigue.

As you can see in the list above, many of these causes are interrelated and, often, there is no single cause for fibromyalgia or any chronic disease. It is a combination of several or possibly all of the above. Because getting to the cause of origin can be complex, I recommend that you seek a functional medicine doctor in your area to help you discover the cause of origin. You do not need to unnecessarily suffer or mask your symptoms with analgesics and antidepressants. There are doctors like me who can help you!

About Amy Myers, MD

After serving 2.5 years in the Peace Corps in rural Paraguay, I decided to become a doctor. During my second year in medical school, I had panic attacks, tremors and insomnia. I was diagnosed with Graves’ disease, an autoimmune disease in which my thyroid attacked itself and caused it to become overactive.

First I did not do anything. Then I tried Chinese medicine and ate a lot of fermented foods, whole grains and powdered herbs that tasted terrible. That did not help at all.

I finally decided to do the conventional medicine called OCT, which prevents my thyroid from producing so much hormone. After a few weeks, I felt terrible. I went back to my doctor to perform laboratory tests and discovered that the medication was damaging my liver and had something called toxic hepatitis. I was ordered to suspend the medication and to rest in strict bed. Fearing for my health, my life and the possibility of having to drop out of medical school, I chose to remove my thyroid.

I never want anyone to go through what I had to go through, so my mission is to educate everyone I can so that there are other, healthier ways to recover from thyroid disease. I have seen incredible health changes with my patients at my Austin UltraHealth clinic    . I share my approach to a wide range of symptoms and diseases related to inflammation, including allergies, obesity, asthma, cardiovascular diseases, fibromyalgia, lupus, IBS, chronic headaches, Graves’ disease and Hashimoto’s thyroiditis in my New York bestseller   York Times It became a New York Times sales success   the first week!


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