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Is Mast Cell Activation Making You Sick?

  [ 15 votes ]   [ 6 Comments ]
By Connie Strasheim • • November 15, 2016

Is Mast Cell Activation Making You Sick?
This past summer I experienced a very difficult setback in my healing journey. In fact, July through October were perhaps the most difficult four months of my life.  The reason? I was exposed to black mold in my home after a poor remediation job, and around the same time, had received some platelet-rich plasma therapy injections in my lower back which caused an adverse reaction in my nervous system. These two things simultaneously set off a cascade of inflammation and horrific MS-like symptoms.

The inflammation incapacitated me and hindered my ability to drive, work and function on a basic level. Dizziness, brain fog, severe depression, fatigue, numbness, a lack of coordination and tremors in my extremities, sleep apnea, chest pain, POTS, tachycardia and disorientation were just some of the symptoms that I endured.  Most days, I couldn’t get out of bed before 5 PM, and was only able to get up and about for a few hours in the evening.

Prior to this, I had been doing pretty well, so the experience was disconcerting. 
Many people who are suffering from Lyme, or who have battled it in the past—as I have, are also susceptible to sickness from mold toxins. Increasingly, Lyme-literate doctors are discovering mold to be a factor that causes illness in their patients. Lyme tends to make people more susceptible to environmental illnesses and allergies of all kinds, but environmental factors can also cause latent Lyme infections to become active.
Regardless, both must be treated if they are causing symptoms— although the symptom picture can be hard to unravel, since mold and Bartonella infections can cause near identical symptom pictures.  In my case, circumstances, doing a test through RealTime Labs, and visiting a Lyme and mold-literate doctor helped me to understand what I was dealing with.

The good news is—after consulting with a variety of practitioners, I finally found one who knew what was going on in my body. The injections and mold had somehow simultaneously inflamed my spinal cord and brain, and caused my immune system to overreact.
Because mold is such an important issue in many with Lyme, many of the doctors featured in my just released book, New Paradigms in Lyme Disease Treatment: 10 Top Doctors Reveal Healing Strategies that Work share their strategies for healing the body from mold toxicity as well as Lyme. If you have a history of exposure to mold or water damage in your home or workplace, or simply suspect that you are mold-toxic, I highly recommend reading what these doctors have to say about mold diagnosis and treatment.
In addition to prescribing me some remedies for mold and mycotoxins, my doctor gave me a couple of natural supplements and a medication for Mast Cell Activation Disorder (MCAD), or systemic mastocytosis, which he suspected was caused by the mold. MCAD is a condition whereby the body releases an excessive amount of mast cells, which are immune cells that release histamine and cause inflammation in the body. 
Like all immune cells, mast cells play an important role in immune function, by releasing wound-healing substances such as histamine and leukotrienes, but can get out of control when the body is faced with chronic health challenges. MCAD can be caused by a variety of environmental insults (and may even be genetic, according to some sources), including mold toxicity, and in my case, it turned out to be an important cause of my symptoms.
I knew because the day after I took an anti-inflammatory medication called Ketotifen that my doctor prescribed to me for mast cell activation—I was a new person in less than 48 hours. I’m still not healed, but I am able to function and work most days, and I no longer cry for hours daily. This little drug worked when dozens of other remedies and detox supplements did not, and literally reduced my symptoms by at least 50-60%, after months of intense suffering—in just under two days. A few of the symptoms, such as the chest pain and apnea—were completely eliminated. 
Now, if I forget to take the medication, the severe symptoms come back full-fledged, because the root cause of the mast cell activation—which is the mold toxicity and whatever damage was done by the injections—hasn’t yet been fully dealt with, but the medication is helping me to function as I heal.
Unlike other commonly known antihistamines like Benadryl, however, Ketotifen isn’t just a Band-Aid for symptoms, and it isn’t anticholinergic; that is, it doesn’t block the neurotransmitter acetylcholine in the central and peripheral nervous system. Some antihistamines do this, and it is why drugs like Benadryl have been associated with Alzheimer’s and memory loss, since acetylcholine plays a vital role in memory and cognition.
Ketotifen seems to have a much safer side effect profile and in fact, may be healing to the body as a couple of doctors and pharmacists that I have spoken with believe that it actually re-sets mast cells in the immune system. However, this process can take many months, even a year or longer.
In any case, Ketotifen has so far been for me one of those little miracles of medicine that has made a huge difference in my wellbeing. In addition to this, I have also been taking a couple of natural supplements that have been known to control mast cell activation; namely, quercetin and Diamine Oxidase (from porcine kidney) in a product called DAO Histaminase by Allergy Research Group. 

I take my medication, quercetin and DAO Histaminase 30 minutes before meals, since certain foods trigger histamine release and taking these supplements before food helps to control histamine and thereby heal the gut. 
A number of other natural substances and medications have anti-histamine or histamine receptor blocking effects, as well, but not all of these drugs or remedies will work well for everyone. Like most things in medicine, treatment must be tailored to the individual.
According to Lawrence B. Afrin, MD, author of Never Bet Against Occam: Mast Cell Activation Disease and the Modern Epidemics of Chronic Illness and Medical Complexity, some medications that can be used to treat MCAD include the anti-depressant doxepin, tricyclic antidepressants and benzodiazepenes. I am not a fan of drugs that cause other problems in the body so I would recommend asking your doctor about others, if you suspect MCAD to be a problem for you.
Dr. Afrin also notes the beneficial properties of quercetin and states that, “It seems to result in reduced production of inflammatory mediators (e.g., leukotrienes and histamine). It may also serve as an inhibitor of tyrosine kinases and other regulatory proteins of interest in activated mast cells.” He notes that quercetin chalcone may be better absorbed than other forms. By itself, quercetin wasn’t enough for me, but it may be a good start for some of you who are reading this (if you have MCAD).  Other supplements with anti-histaminic properties, such as Vitamin C, may also be helpful. 
Mast cell activation disorder (MCAD) is not rare. In fact, it is now thought by some savvy doctors to be a major player in many chronic, degenerative diseases. For instance, in his book, Dr. Afrin lists at least a couple of hundred conditions that he suspects are at least indirectly due to MCAD. These include chronic fatigue syndrome and fibromyalgia. Lyme disease and mold are not listed, but a couple Lyme-literate doctors that I know believe that mold and Lyme can cause MCAD and I can tell you from experience that it has been a major cause of the mess in my body that I had to deal with this past summer.
In any case, I have learned enough to believe that MCAD may be a major player in Lyme and mold illness, and that if you suffer from these conditions, you may want to seek out a physician who understands MCAD and who can prescribe a trial treatment to determine whether, in fact, it is a part of your symptom picture. Trust me, if MCAD is a problem for you, you will want to know.
In the meantime, and as I continue my recovery, I am thankful for this relatively recent discovery in medicine, which has provided some doctors with a fantastic new tool for helping their patients- and for people like me- new answers and hope. 
Afrin, L. 2016. Never Bet Against Occam.  Bethesda, MD: Sisters Media, LLC.
Frieri, M. Patel R, Celestin J. Mast cell activation syndrome: a review.
Curr Allergy Asthma Rep. (2013 Feb);13(1):27-32. doi: 10.1007/s11882-012-0322-z.
Mast Cell Activation Disorder (MCAD), Chronic Illness, and its Role in Methylation. Genetic Genie. Accessed on Nov. 5, 2016 from:
Valent, P. Mast cell activation syndromes: definition and classification.
Allergy. (2013 Apr);68(4):417-24. doi: 10.1111/all.12126. Epub 2013 Feb 15.

Connie Strasheim is the author, co-author or ghostwriter of 10 wellness books, including four on Lyme disease, and the just-released New Paradigms in Lyme Disease Treatment: 10 Top Doctors Real Healing Strategies that Work. She is also a medical copywriter and Editor of Pro Health’s Lyme disease page, as well as Editor of the Alternative Cancer Research Institute. Her passion is to help people with complex chronic illnesses find freedom from disease and soul-spirit sickness using whole body medicine and prayer, and she collaborates with some of the world's best integrative doctors to do this. In addition to Lyme disease, Connie’s books focus on cancer, nutrition, detoxification and spiritual healing. You can learn more about her work at:

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Article Comments Post a Comment

Lyme and MCAD
Posted by: donnamw
Nov 16, 2016
Hi Connie,

I taught in a classroom that was full of mold and I tested positive for trichnothecene. I later was infected with lyme. I am unable to tolerate anything that boosts the immune system or kills bacteria. I get such bad flares and so full of inflammation that I get joint damage whenever I try a new supplement or herbal. I am currently taking ketotifen, quercetin, zantac, desloratadine and quercetin and still can't tolerate trace amounts of supplements. I can't find anyone to treat me and would love to know who is treating you. Thanks for the well done article.
Reply Reply

Please help
Posted by: Court31
Nov 16, 2016
Hi could you please message me the name of your doctor that found out the mold had invaded your spinal cord and brain and caused the mcad issues? Im in great need of a good physician for mold and Lyme. Thank you, Courtney
Reply Reply

MCAD & Lyme
Posted by: lexipetrie
Nov 23, 2016
Get this girl some Ketotifen! Thank you so much for sharing, I am a lymie and many other things including MCAD. I sure hope this provides me the relief that it did you as it has nearly been a year of constantly swollen.

Thanks again,

Reply Reply

I think this is a very good article
Posted by: basketnut
Nov 23, 2016
I have been sick for 32 years with chronic fatigue syndrome, and I could have this MCAD also. I need a doctors name in my area. I live in eastern Iowa
Reply Reply

Doctor in Denver
Posted by: longpartyofone
Jan 5, 2017
Dr. Weber at National Jewish 303-388-4461. I realize this is not in your area, but you may have to travel to get the help you need. Cindy
Reply Reply

Mold Exposure & Mast Cell
Posted by: MastCell-Californiagirl
Oct 29, 2017
Years ago I was diagnosed with POTS (Postural Orthostatic Tachycardia) at the Mayo Clinic. With a few medications I had it under control. Last months I was diagnosed with Mast Cell Activation Disorder! This is when it started... Eight months ago I had anaphylactic emergency room visit and my body has never been able to be without MANY medications to control allergic response since! We found Black Mold in our home (we hired someone to do work on our home and they drilled a hole in a pipe leading to our upstairs toilet )-:). Black Mold appeared on wall/ceiling /floor etc... an environmentalist had to work months to clean it up. I'm pretty sure this daily mold exposure caused my condition. It's not a fun thing to live with.
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