It Could Be MCAS: When Your Body Starts Overreacting to Everything

Understanding Mast Cell Activation Syndrome—and Why It’s More Common Than You Think

Have you ever felt like you’re suddenly reacting to everything—foods you used to tolerate, smells that never bothered you, temperature changes, stress, even your supplements or skincare? Like your body has turned hypersensitive overnight?

You’re not imagining it. It could be MCAS—Mast Cell Activation Syndrome.

What Is MCAS?

Mast cells are a type of immune cell that help protect you from infection and injury. They’re supposed to activate in response to real threats—like bacteria, parasites, or trauma—by releasing histamine and other inflammatory chemicals.

But in MCAS, the mast cells go haywire. They start overreacting to things that aren’t dangerous, flooding your system with inflammatory signals in response to everyday triggers—certain foods, perfumes, stress, heat, cold, or even emotional tension.

It can feel like you’re suddenly “allergic to life.” The symptoms can be unpredictable, wide-ranging, and dismissed as anxiety, IBS, or “just stress”—when in reality, your immune system is overreacting.

A Hidden Link: mRNA, Spike Protein & Mast Cell Dysregulation

Since 2020, a huge number of people have developed MCAS-like symptoms after receiving the mRNA COVID injection. This is often labelled “long COVID,” but in many cases, what’s really happening is immune system dysregulation triggered by prolonged spike protein production.

The mRNA technology used in the COVID injections instructs the body to continuously produce spike protein, which can linger far longer than originally thought. Spike protein itself is inflammatory—and in certain individuals, it activates mast cells, creating a flood of histamine and inflammatory chemicals that affect the entire body.

Some people have developed symptoms like:

• Burning skin, itching, hives, and flushing

• Sudden food and chemical sensitivities

• Dizziness, heart palpitations, shortness of breath

• Internal vibrations or buzzing

• Brain fog, anxiety, and chronic fatigue

These symptoms are often dismissed or misdiagnosed, but what’s really going on is a mast cell storm—a nervous system and immune system locked in a hyper-reactive state.

The Good News: You Can Get Better

While many have been told that these symptoms are permanent or mysterious, the truth is: MCAS is highly manageable when you address it at the root.

This involves:

• Calming the nervous system—reducing the body’s perception of threat through breathwork, grounding, vagus nerve stimulation, and somatic therapies

• Stabilising mast cells naturally—with nutrients like quercetin, luteolin, vitamin C, magnesium, and herbs like nettle and ginger

• Following a low-histamine, anti-inflammatory diet—to ease the load on your system while it heals

• Supporting detox and mitochondrial health—especially in those affected by the spike protein or vaccine injury

• Uncovering trauma and releasing emotional load—because mast cells are directly linked to emotional memory

Your body is not attacking you. It’s overwhelmed. And with the right approach, you can calm the storm.

MCAS Is Not the End of the Story

If you’ve been told it’s just anxiety, or that this is just “your new normal,” know this: You are not crazy. And you are not broken.

What’s being passed off as “long COVID” is, for many, a treatable, reversible condition of immune dysregulation. Whether your symptoms began after an infection, a vaccine, or seemingly out of nowhere—there is hope.

Let’s Find the Real Root Cause—Together

If you suspect MCAS or are dealing with unexplained symptoms no one can explain, I’m here to help. I offer a free 20-minute discovery call to talk through your health history and explore a path to recovery using naturopathic nutrition, nervous system support, and holistic tools.

Click below to book your free call. Let’s help your body feel safe again—so healing can finally begin.