Anxiety, depression, irritability, brain fog, and emotional changes are usually viewed as problems that start in the brain. Sometimes they do. But when these symptoms appear alongside fatigue, pain, digestive issues, recurrent infections, or other unexplained symptoms, I start asking more questions.
A mood disorder diagnosis can be helpful, but it is still a description of what is happening. It does not necessarily tell us why it is happening. In my practice, the bigger question is often: What is happening upstream that could be affecting the brain, immune system, and mood at the same time?
The Brain and Immune System Are Not Separate Worlds
We tend to think about the brain and immune system as separate systems. In reality, they communicate constantly. Changes in immune function can affect how you feel physically, cognitively, and emotionally.
Inflammation itself is not inherently bad. It is part of the body's normal response to infection, injury, and other threats. The problem develops when inflammatory signaling stays activated longer than it should.
Persistent inflammation can affect many areas involved in how you feel and function, including:
- Sleep quality
- Energy and motivation
- Concentration and memory
- Stress tolerance
- Emotional regulation
- Neurotransmitter activity
- Overall cognitive function
Mood Symptoms Can Be Part of the Downstream Mess
I frequently use the term "downstream mess" with patients. It describes the collection of symptoms and diagnoses that can develop downstream from underlying immune dysfunction.
Conventional medicine is very good at giving these symptoms names. You may be diagnosed with depression, anxiety, insomnia, chronic fatigue, or another disorder. Those labels can help describe what you are experiencing.
But a description is not necessarily an explanation.
When Mood Changes Are Part of a Bigger Pattern
I become especially interested in inflammation when mood symptoms occur with other unexplained problems. These may include:
- Brain fog
- Fatigue
- Poor sleep
- Headaches
- Muscle or joint pain
- Digestive symptoms
- Allergies and sensitivities
- Recurrent infections
- Autoimmune problems
- Unusual reactions to foods or environmental exposures
The Root Cause Triad: Looking Upstream
At Restorative Medicine Center, I use a framework called the Root Cause Triad. It developed from years of treating patients with complicated, chronic illnesses.
The three major areas are microbes, toxins, and the stress response. These factors can interact and contribute to immune imbalance. That immune dysfunction can then contribute to chronic inflammation and downstream symptoms.
Microbes
Microbes include bacteria, viruses, fungi, and parasites. Some microbial problems may have a greater effect on immune function than others.
In my clinical framework, I distinguish between primary and secondary microbes. Primary microbes may help drive immune dysfunction. Secondary microbes may persist because an already struggling immune system cannot adequately control them.
This distinction matters. Simply finding a microbe does not automatically tell us what role it is playing.
Biotoxins and Other Exposures
Another piece involves toxins, including biologically produced toxins known as biotoxins. Environmental mold exposure is one potential source. Microbes living inside the body may also contribute to this burden.
The important question is not simply whether an exposure occurred. We need to understand whether it fits the patient's symptoms, immune findings, history, and treatment response.
The Stress Response
The third piece is often underestimated.
Living in a chronic fight-or-flight state can make healing much more difficult. This does not mean your symptoms are caused by stress or are "all in your head."
It means the nervous system is part of the physiology we need to address.
The Inflammation and Fight-or-Flight Feedback Loop
The amygdala is involved in detecting potential threats. Think of it as part of your internal alarm system.
When that system becomes hypervigilant, the body can spend too much time in a sympathetic state. That is the familiar "fight or flight" response. My patient materials describe this relationship between the amygdala, autonomic nervous system, inflammation, and immune dysfunction.
When the Alarm System Stays On
The relationship can become a frustrating feedback loop:
- Microbes or biotoxins contribute to immune activation.
- Immune dysfunction contributes to inflammation.
- Inflammation can make the nervous system more reactive.
- The amygdala becomes increasingly hypervigilant.
- The body spends more time in fight or flight.
- Healing becomes more difficult.
Simple strategies may include breathing exercises and gratitude meditation. Some patients need more comprehensive nervous system retraining. The goal is to spend more time in a parasympathetic, or "rest and digest," state.
When Should We Look Beyond a Psychiatric Diagnosis?
Not every case of anxiety or depression is caused by inflammation. I want to be very clear about that.
Mental health conditions deserve appropriate evaluation and treatment. At the same time, we should not ignore physical contributors when the patient's history suggests something more is happening.
A broader medical evaluation may be worth considering when mood symptoms occur with:
- Significant fatigue or post-exertional symptoms
- Brain fog or cognitive decline
- Recurrent infections
- Autoimmune disease
- New allergies or sensitivities
- Chronic digestive problems
- Unexplained muscle or joint symptoms
- Neurological symptoms
- Major changes following an infection
- Symptoms linked with certain environments or exposures
Sudden Neuropsychiatric Changes in Children
This becomes particularly important when a child's personality or behavior changes abruptly.
PANS and PANDAS can involve sudden neuropsychiatric symptoms. These may include OCD, anxiety, emotional instability, tics, sleep problems, and cognitive changes. Our patient education materials discuss infection and immune activation as important considerations in these cases.
A child who seems dramatically different almost overnight deserves a careful evaluation. We should not assume every behavioral change is purely psychological.
How We Dig Deeper
There is no single blood test that explains every case of chronic inflammation or mood dysfunction. Complex illness requires context.
I want to understand the patient's entire story. That includes when symptoms began, what makes them worse, and what makes them better.
We may look at:
- Previous infections
- Environmental exposures
- Autoimmune history
- Allergies and sensitivities
- Sleep
- Stress response
- Digestive symptoms
- Hormone and nutrient status
- Medications and supplements
- Previous treatment responses
Looking for Clues in Laboratory Testing
Depending on the individual patient, we may evaluate biomarkers associated with immune and inflammatory activity.
Tests used in our office can include:
- C4a
- TGF-beta 1
- MMP-9
- ECP
- VEGF
- hsCRP
- ANA and other autoantibodies
- Immunoglobulin levels
- Cortisol
- Vitamin D markers and ratio
Our lab interpretation guide specifically notes that many factors can affect these biomarkers. Results must be interpreted alongside symptoms, history, and other testing.
Treatment Is Not About Chasing Every Symptom
Once we identify possible root cause issues, the temptation is to attack everything at once. I generally do not recommend that.
My treatment philosophy is much simpler: Stay calm and cover your root cause issues at a rate you can handle. Then keep doing that long enough for the downstream mess to improve.
Depending on the patient, treatment may involve:
- Addressing identified microbial problems
- Reducing relevant environmental exposures
- Supporting nervous system regulation
- Improving sleep
- Optimizing indoor air quality
- Eating clean, nourishing foods
- Correcting nutrient deficiencies
- Addressing hormone imbalances when appropriate
- Gradually increasing move
- ment as tolerated
Your Response Is One of Our Most Important Data Points
I also want patients tracking what happens during treatment.
When we add a medication, supplement, or intervention, I want to answer two questions:
- Is it tolerated, and at what dose?
- Is it beneficial, and how?
Our treatment tracking instructions encourage patients to record symptoms, interventions, lifestyle changes, and significant exposures over time. This helps us identify cause-and-effect patterns.
Your Symptoms Are Clues, Not the End of the Investigation
Mood symptoms are real, and they can have an enormous effect on quality of life. Appropriate mental health support remains important. But when those symptoms occur within a larger pattern of chronic illness, we should be willing to ask what else may be contributing.
The goal is not to blame every mood disorder on inflammation. The goal is to remain curious enough to keep digging when the pieces do not fit. Sometimes understanding what is happening upstream can change how we approach everything happening downstream.
Ready to Dig Deeper? Connect With Restorative Medicine Center
If you have persistent mood, cognitive, and physical symptoms, your health story may deserve a wider lens. At Restorative Medicine Center, we use Integrative and Functional Medicine to investigate potential root causes rather than focusing only on symptom labels.
Restorative Medicine Center
Teresa Birkmeier-Fredal, MD
705 Barclay Cir #115
Rochester Hills, MI 48307
Phone: 248-289-6349
Fax: 248-289-6923
Office Hours: Monday through Thursday - 9 AM to 5 PM, Friday - Closed
Website: restorativemedcenter.com
We Dig Deeper. No bandaids. No gimmicks.