Inappropriate Mast Cell Activation / MCAS

When Your Immune System Won’t Turn Off the Alarm

Sudden flushing. Unexplained hives. Reactions to everyday foods, scents, or temperatures. Dizziness, brain fog, or gut upsets that flare without warning.

You don’t need an official syndrome diagnosis to know your body is reacting abnormally. At Integrative Health Clinic, we see inappropriate mast cell activation not as an isolated, lifelong disease label, but as a key driver of chronic inflammation. Our focus is on uncovering why your mast cells are triggered and calming the system so your body can heal.

Common Concerns We See

When mast cells stay activated, symptoms shift daily across multiple systems:

  • Unexplained flushing, hives, itching, or burning skin

  • Sudden bloating, cramping, nausea, reflux, constipation or diarrhoea

  • Brain fog, migraines, dizziness, or sensory overload

  • Racing pulse, palpitations, or lightheadedness

  • Throat clearing, airway tightness, or chronic sinus congestion

  • Deep fatigue, joint aches, or feeling "reactive to everything"

  • Vulvodynia, frequent urination, Urgency, pain

What Could Be Driving It

We go deeper than symptoms to find the root:

  • Chronic or latent infections (viral reactivations, tick-borne, dental, or sinus)

  • Hormonal fluctuations and estrogen-histamine loops

  • Nervous system dysregulation and chronic fight-or-flight stress

  • Impaired clearance pathways (sluggish DAO or HNMT enzyme activity)

  • Environmental irritants, VOCs, dampness, and mould/mycotoxins

  • Could be associated with hypermobility

  • Gut dysbiosis, bacterial imbalances, or SIBO

  • Intestinal permeability ("leaky gut")

Testing to Guide Care

We test when it adds value—and always explain why.

  • Comprehensive symptom-mapping and mast cell reactivity questionnaires

  • Assessment of histamine tolerance and digestive enzyme breakdown capacity

  • Hormonal assessment (sex hormones, adrenal, and thyroid balance)

  • Micronutrient status and optimisation (zinc, iron, magnesium, B12, folate, copper, etc.)

  • Intestinal barrier integrity markers (calprotectin, zonulin)

  • Environmental toxin, mycotoxin, and heavy metal screens

  • Comprehensive GI mapping (Shotgun metagenomic stool testing) for histamine-producing microbes

  • SIBO and carbohydrate malabsorption breath testing

  • Medical referrals when formal specialist review, endoscopy, or scans are indicated

Your Personalised Plan May Include

No generic protocols—just what’s right for you.

  • Targeted mast cell stabilisation: Prescribed pharmaceutical stabilisers (sodium cromoglicate, antihistamines, LDN, ketotifen, omalizumab/Xolair, GLP-1 receptor agonists, montelukast, etc.) or receptor blockers when indicated, natural bioflavonoids (quercetin, luteolin, PEA), and compounded pharmaceuticals matched to your tolerance levels

  • Dietary calming strategies (thoughtfully tailored low-histamine or anti-inflammatory diets to soothe flares without unnecessary restriction)

  • Identifying and reducing your personal triggers (addressing sleep, stress, mould exposure, and an exercise program suitable for you)

  • Prescription therapeutics (funded and compounded pharmaceuticals, precision nutraceuticals, and herbal formulations to address inflammation and tissue reactivity)

  • Clearance support (nutrients and cofactors to enhance histamine metabolism and support liver clearance pathways)

  • Nervous system and vagal tone support (somatic practices and neuro-retraining to switch out of emergency mode)

  • Root-cause gut protocols (addressing dysbiosis, clearing overgrowths, and repairing mucosal linings to lower internal immune stimulation)

  • Collaborative care (co-management alongside gastroenterologists and other specialists, as well as bodywork therapists: chiropractors, physiotherapists, osteopaths, acupuncturists)

Care That Evolves With You

Being reactive to everyday life is exhausting—especially when standard tests say "everything looks normal." We don't wait for your symptoms to fit into a rigid diagnostic box before helping you. Our team works with you to calm underlying inflammation, rebuild resilience, and help you feel safe and comfortable in your body again.