Complex Chronic Patterns

Multiple symptoms, no answers, and running out of options?

When your health involves overlapping systems — fatigue, gut, hormones, mood, and immunity tangled together — functional medicine maps the full picture and finds the thread that ties it all together.

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Sound Familiar?

Signs your health needs a systems-level approach

If you’ve seen multiple specialists, tried multiple treatments, and still don’t have answers — your symptoms aren’t random. They’re connected by underlying patterns that no one has mapped.

Multi-system symptoms

Fatigue plus gut issues plus mood changes plus hormonal disruption. It’s not four separate problems — it’s one pattern with four expressions.

Years without answers

You’ve been investigating for years. Specialists have ruled things out but no one has put the pieces together.

“Normal” test results

Every blood test comes back within range. You’re told there’s nothing wrong — but your body tells a different story.

Treatments that don’t last

Things improve temporarily then symptoms return. You’re managing but never resolving the underlying driver.

Sensitivity to everything

Foods, chemicals, medications, supplements — your body reacts to things that shouldn’t cause problems. Your tolerance threshold has collapsed.

Post-viral or post-infection decline

Your health changed after an illness and never fully recovered. Glandular fever, COVID, or a mystery infection reset your baseline.

The Gap in Standard Care

Why conventional medicine struggles with complexity

The conventional system is designed around single-organ specialities. When your symptoms span multiple systems, you get referred from specialist to specialist — each looking at their piece but no one seeing the whole picture.

Functional medicine is built for this. We investigate the interconnections between your gut, immune, hormonal, neurological, and detoxification systems — finding the common upstream drivers that explain everything.

Multi-system inflammation — a single inflammatory driver expressing across gut, brain, joints, and immune function
Chronic infection or reactivation — EBV, Lyme, mould, or other stealth infections maintaining immune activation
Toxic burden accumulation — heavy metals, mould toxins, or environmental chemicals overwhelming detox pathways
Autonomic nervous system dysfunction — a dysregulated stress response affecting every organ system simultaneously
Compounding nutrient depletion — years of poor absorption and increased demand leaving your biochemistry running on empty

“Investigates things that other practitioners won’t. He has a depth of knowledge and experience and is able to apply that to specific needs. One of the first times I’ve felt that a medical appointment wasn’t a waste of time. Came out with a clear and practical plan.”

— Tom, Adelaide

One Example of a Complex Pattern

What’s the Difference Between MCAS and Histamine Intolerance?

Complex chronic patterns encompass a wide spectrum of multi-system conditions — from mould illness and long COVID to autoimmune overlap syndromes, tick-borne illness, and beyond. One example that illustrates the diagnostic complexity of this space is the distinction between MCAS and histamine intolerance: both produce overlapping multi-system symptoms — flushing, hives, gut disturbance, headaches, brain fog, and reactions to foods and environmental triggers — but they have different origins and require different approaches. This is the kind of layered distinction that functional assessment is designed to unravel.

Comparison table: Mast Cell Activation Syndrome (MCAS) vs Histamine Intolerance
Feature	MCAS (Mast Cell Activation Syndrome)	Histamine Intolerance
What it is	A disorder in which mast cells activate inappropriately and release excessive inflammatory mediators — including histamine, prostaglandins, and leukotrienes	An accumulation of dietary histamine exceeding the body’s ability to break it down, primarily due to reduced DAO (diamine oxidase) enzyme activity
Root cause	Dysregulated mast cell behaviour — may be linked to genetic mutations, infections, gut dysbiosis, or connective tissue disorders (e.g. hypermobile EDS)	Impaired histamine degradation — DAO enzyme deficiency (genetic or acquired), gut damage, certain medications, or excess histamine-producing gut bacteria
Trigger type	Wide range of triggers — foods, fragrances, temperature changes, stress, infections, medications, exercise; reactions can be unpredictable and inconsistent	Primarily dietary — high-histamine foods (aged cheese, wine, fermented foods, leftovers); reactions tend to be dose-dependent and more predictable
Mediators involved	Histamine plus many others — prostaglandins, tryptase, heparin, interleukins — which is why symptoms span multiple body systems in MCAS	Primarily histamine — symptoms are more localised to histamine receptor sites (gut, skin, sinuses, vascular)
DAO enzyme role	DAO deficiency may be present but is not the primary driver; supplementing DAO alone often provides limited relief	Central to the condition — DAO supplementation with meals can significantly reduce symptom load in histamine intolerance
Testing	Serum tryptase, prostaglandin D2, urinary methylhistamine, N-methylhistamine; comprehensive testing required as no single marker is definitive	DAO blood level or activity; plasma histamine; dietary elimination trial; response to low-histamine diet is often strongly diagnostic
Treatment approach	Mast cell stabilisers, antihistamines (H1 and H2), low-histamine diet as a management tool, addressing root triggers (gut, infections, nervous system dysregulation)	Low-histamine diet, DAO enzyme supplementation with meals, gut repair to restore DAO production, addressing dysbiosis contributing to excess histamine production

What this means for you

If your reactions feel unpredictable — triggered by stress, temperature, or things that shouldn’t bother you — MCAS is more likely than simple histamine intolerance. If your reactions are consistently food-related and dose-dependent, histamine intolerance with impaired DAO activity may be the primary driver. Both patterns respond to different interventions, and both are assessable through functional testing.

The Process

A structured path from confusion to clarity

No guesswork. Every step is guided by testing, clinical experience, and a deep understanding of how your body’s systems interconnect.

Map Your Pattern

A comprehensive 90-minute initial consultation to understand your full history, symptoms, lifestyle, and what’s been missed. We identify the patterns that matter.

Test What Matters

In-depth pathology interpretation that catches what others miss — plus targeted functional testing when deeper answers are needed.

Build Your Plan

A personalised treatment protocol targeting root causes — nutritional support, gut restoration, nervous system regulation, and lifestyle recalibration.

Video coming soon

From Rohan

Understanding complex chronic patterns from a functional perspective

In this short video, Rohan explains why multi-system illness requires a different approach — and how functional medicine connects symptoms that conventional specialities treat in isolation.

If you’ve been to multiple doctors without answers, this is the framework that finally makes sense of your experience.

Functional Testing

What we investigate

The comprehensive testing approach we use to map the full picture and find the upstream drivers.

Comprehensive Blood Chemistry

Functional ranges across 50+ markers — thyroid, hormones, inflammation, nutrients, immune, and metabolic function.

Organic Acid Profile

Maps mitochondrial energy, neurotransmitter metabolism, nutrient status, and detoxification capacity in one test.

Comprehensive Stool Analysis

DNA-based gut mapping — bacteria, parasites, intestinal permeability, digestive function, and immune activation markers.

DUTCH Hormone Panel

Complete cortisol rhythm, sex hormones, and metabolite mapping — the hormonal layer of your pattern.

Genetic & Methylation Panel

MTHFR, COMT, and related variants — how your genetics influence your susceptibility and recovery.

Environmental Toxicity Screening

Heavy metals, mould toxins (mycotoxins), and chemical exposures that maintain chronic illness.

Common Questions

Complex Chronic Patterns — Frequently Asked Questions

What does “complex chronic condition” mean — how is it different from a regular illness?

A complex chronic condition involves multiple overlapping systems — gut, hormones, immune, neurological — rather than a single, clearly defined disease. It’s characterised by symptoms that don’t fit neatly into one diagnosis, often persisting for months or years, and frequently failing to respond to standard treatment. What makes it complex isn’t the severity — it’s the interconnection. When gut dysfunction is driving hormonal disruption, which is affecting brain function and worsening fatigue, treating any single piece in isolation rarely resolves the whole picture.

Why have I seen multiple specialists without getting a clear answer?

Specialist medicine is organised by body system — gastroenterologist for gut, endocrinologist for hormones, neurologist for brain. When your problem crosses multiple systems, each specialist sees their piece clearly but not the whole. Functional medicine is specifically designed for this gap: we look across systems simultaneously, map how they’re influencing each other, and treat the root causes connecting them — not individual symptoms in isolation.

How does functional medicine approach conditions that don’t fit a single diagnosis?

We start with a comprehensive case history that maps your full symptom timeline, not just current complaints. We then use functional testing to assess the key systems involved — gut, hormones, immune, mitochondrial, neurological — and identify where the dysfunction actually lies. From there, we build a treatment plan that addresses root causes in order of priority. The approach is iterative: we reassess, adjust, and add layers as the picture becomes clearer.

What does a first consultation look like for someone with multiple overlapping symptoms?

The initial consultation runs 90 minutes. We go through your full health history in detail — when symptoms started, what makes them better or worse, what you’ve already tried, and what your previous results show. By the end, you’ll have a clear working hypothesis, a list of functional tests we recommend to confirm it, and an initial treatment plan we can start while we wait for results. You won’t leave with a vague “let’s wait and see.”

Is there a realistic chance of significant improvement when nothing else has worked?

Yes — and this is the population we most commonly work with. The reason previous approaches often haven’t worked isn’t that the condition is untreatable; it’s that the underlying drivers haven’t been identified. When we find and treat the actual cause — whether that’s gut dysbiosis driving systemic inflammation, methylation impairment affecting detoxification, or an HPA axis that’s been dysregulated for years — the response is often significant. We’re honest about timelines and complexity, but we don’t write cases off.

Do I need to bring a full medical history to the first appointment?

Bring whatever you have — previous blood results, specialist letters, imaging, supplements you’re currently taking. Nothing is too old or irrelevant. If you don’t have anything, that’s completely fine — we start from scratch. A detailed intake form is sent before your appointment so we can make the most of the time together. Book directly online, no referral needed. Telehealth available for interstate clients. See the Services & Fees page for consultation options and pricing.

Patient Experience

“Rohan was the first practitioner to target my complex condition from a different angle which has ended up working remarkably. I appreciate his knowledge of the interconnectedness of bodily processes.”

— Xandir, Adelaide

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