← All Articles
Root-Cause Doctor or Symptom-Focused Care? What's the Difference, and Which Do You Need?
Most of us were raised on one kind of medicine: find the diagnosis, then the prescription. A root-cause physician asks a different question: why is this happening? Here's the difference in plain words, who it helps most (autoimmune conditions, long COVID, chronic pain, and more), and how to tell if it's time to find one.
MK Wellness InsightsFounded by Danielle Cordova, Cypress, TX
On this page (10 sections)
Most of us grew up with one kind of medicine. You have a symptom, you see a doctor, you get a diagnosis, and you leave with a prescription. For a broken bone, an infection, or an emergency, that model saves lives.
But what if the symptoms keep coming back? What if your labs are "normal" and you still don't feel normal? That's where a root-cause physician comes in. Here's the difference, in plain words.
At a glance
Research stagePromising
Positive randomized or controlled human trials; still being confirmed.
What it is
A physician who looks for why your symptoms are happening, the triggers and imbalances underneath them, and treats that, instead of only medicating each symptom.
Why people choose it
For people with complex health conditions, autoimmune conditions, long COVID, chronic pain, fatigue, gut problems, or blood sugar concerns, anyone told their labs are normal when they don't feel normal, and healthy people who want to optimize for longevity.
What the research shows
In a Cleveland Clinic study of 7,252 adults, patients at its functional medicine center reported larger gains in physical health at 6 months than matched primary care patients.
Know first
Keep your primary care doctor, and never stop or change a prescribed medicine on your own. A root-cause physician works alongside the care you already have.
Where to get it: Dr. Tina Hills, D.O., a board-certified root-cause and longevity physician, sees patients at MK Wellness in Cypress a few days a week. Take the 1-minute quiz to see where you'd start.
The Short Version
- Symptom-focused care asks, "What's the diagnosis, and what treats it?" It's fast, essential in emergencies, and built around a prescription for each problem.
- A root-cause physician asks, "Why is this happening?" Longer visits, deeper labs, your whole history, and a plan aimed at the cause.
- They aren't opposites. Many people keep their primary care doctor and add a root-cause physician to dig deeper.
- It matters most for chronic problems that keep coming back or have never been explained.
Two Different Questions
- The question. Symptom-focused: "What's the diagnosis?" Root-cause: "Why is this happening?"
- Visits. Symptom-focused: usually short, focused on today's problem. Root-cause: longer, with your full history.
- Labs. Symptom-focused: a standard panel. Root-cause: advanced labs and gut testing, read in depth.
- The body. Symptom-focused: each organ or symptom on its own. Root-cause: gut, immune system, inflammation, nutrition, sleep, and stress, together.
- Treatment. Symptom-focused: a prescription for each symptom. Root-cause: treatment matched to the cause, with prescriptions when you need them.
- Follow-up. Symptom-focused: refills. Root-cause: repeat labs to measure your progress.
What Symptom-Focused Care Does Well
This isn't about one being good and the other bad. If you're having a heart attack, have a serious infection, or break a bone, you want fast, conventional medicine. Medicines save lives and ease suffering every day.
The challenge is chronic illness. When the same symptom keeps returning, adding a new prescription for each one can leave the cause untouched, and you can end up with a list of medicines and no answers.
What a Root-Cause Physician Does Differently
The Institute for Functional Medicine describes functional medicine as a systems biology-based approach that focuses on identifying and addressing the root cause of disease. In practice, a root-cause physician:
- Takes your whole story. When did this start? What changed around then: an illness, a move, a new job, a loss, a surgery?
- Looks deeper in your labs. A "normal" lab range describes where most people in a reference group fall, not where you feel and function your best. Advanced testing looks at inflammation, metabolism, nutrients, and immune markers, and a GI-MAP stool test looks at your gut.
- Connects the systems. Your gut, immune system, blood sugar, sleep, and stress all talk to each other. A problem in one often shows up as a symptom somewhere else.
- Treats the cause. That might mean nutrition, repairing the gut, targeted therapies, peptides, hands-on osteopathic treatment, or regenerative care, and prescriptions when you need them.
- Measures progress. Repeat labs show what's changing, not just how you feel that week.
We go deeper into the model in What Is Functional Medicine and The Hierarchy of Healing.
What About a D.O.?
You'll see "D.O." after Dr. Hills' name. A Doctor of Osteopathic Medicine is a fully licensed physician, like an M.D., who can practice in any specialty and prescribe medicine. D.O.s also train in the musculoskeletal system and in hands-on osteopathic manipulative treatment (OMT), so they're taught to see how the whole body works together.
Who Root-Cause Care Helps Most
Complex health conditions
When you have several problems at once, you often end up with a different specialist for each, and no one looking at the whole picture. A root-cause physician connects the dots: how your gut, immune system, inflammation, metabolism, and history fit together, so the plan addresses what's driving all of it.
Autoimmune conditions
Autoimmune diseases affect about 8% of people, and 78% of them are women (Emerging Infectious Diseases, 2004). A root-cause physician looks for the triggers behind the immune attack: the gut, food, hidden infections, toxins, and stress. Read Autoimmunity From the Root and our free Autoimmune Support Toolkit.
Long COVID and never feeling right after an illness
Some people never fully recover after COVID-19 or another infection. In a blinded two-year study, virus proteins (mostly spike) were found in the blood of 31% of people with long COVID at 6 to 12 months, compared with 5.4% of people who were never infected (Clinical Microbiology and Infection, 2026). A root-cause physician looks at what's still off: inflammation, the gut, energy, and the nervous system. See our spike protein guide.
Chronic pain and injuries
Pain that lingers often has more than one driver: how the body moves, inflammation, and tissue that hasn't fully healed. A D.O. can add hands-on osteopathic treatment, and regenerative options like stem cells and exosomes are available after a medical evaluation. See injury recovery and stem cell therapy.
Stress, trauma, and a nervous system stuck in fight-or-flight
Stress and trauma don't only live in the mind. A nervous system stuck on high alert affects sleep, digestion, pain, and healing. A whole-person physician looks at that too, with somatic and nervous system work alongside everything else. See the nervous system reset.
Fatigue that won't go away
Ongoing exhaustion is a signal, not a personality trait. Labs can show inflammation, blood sugar problems, and nutrient gaps that a quick visit can miss.
Gut and digestive problems
Bloating, reflux, and IBS-type symptoms are often treated one pill at a time. A GI-MAP test looks for what's behind them, and the gut is connected to the immune system, mood, and skin. See the gut-immune connection.
Blood sugar, weight, and cholesterol
Insulin resistance can develop for years before blood sugar looks abnormal on a standard test. See Dr. Bikman on insulin resistance and statins and cholesterol.
Longevity and health optimization
You don't have to be sick to benefit. A longevity-focused physician uses advanced biomarkers to find what to optimize now (energy, strength, metabolic health, sleep, and recovery) and tracks it over time, so you stay well instead of waiting for a diagnosis. See Dr. Attia on longevity and mitochondria from the root.
"Normal" labs, but you don't feel normal
This is one of the most common reasons people look for a root-cause physician. Normal ranges are wide, and a standard panel doesn't test everything.
What the Research Shows
1.59 vs 0.33points of improvement in patient-reported physical health at 6 months, functional medicine vs matched primary care patientsJAMA Network Open, 2019
31%of people with long COVID had virus proteins in their blood 6 to 12 months after infectionClinical Microbiology and Infection, 2026
The best-known comparison comes from the Cleveland Clinic, which runs its own Center for Functional Medicine. Researchers compared 7,252 adults treated at that center or at a Cleveland Clinic family health center. At 6 months, the functional medicine patients reported larger improvements in physical health (1.59 vs 0.33 points on the PROMIS global physical health score). Patients followed at both 6 and 12 months kept improving (2.61 vs 0.25 points) (JAMA Network Open, 2019). The authors call for prospective studies to confirm the findings.
Signs It's Time to See a Root-Cause Physician
- You've had the same symptoms for months or years.
- You're on more than one medicine and still don't feel well.
- You've been told your labs are "normal," but you don't feel normal.
- You have an autoimmune diagnosis and want to know what's driving it.
- You never felt right after COVID-19 or another illness.
- Pain keeps coming back after it "should" have healed.
- You want to catch problems early, before they become a diagnosis.
Questions to Ask Any Root-Cause Doctor
- Are you a licensed physician (M.D. or D.O.), and what's your training?
- Which labs do you run, and will you walk me through the results?
- How do you work with my primary care doctor and my current medicines?
- How will we measure whether this is working?
- What will this cost, and what's included?
Our View
The body is designed to heal. Symptoms are its way of telling us something is off, and they deserve an answer, not only a prescription to quiet them. We've always believed in getting to the root cause, and for anyone who needs a physician to find it, or who wants to optimize their health for the long run, we refer our clients to Dr. Tina Hills, D.O., and her practice, PHMX. She trained in emergency medicine, so she knows exactly when you need a prescription, and when a symptom is pointing to something deeper.
Not sure where to start? Take the 1-minute quiz: Is Dr. Hills the Right Doctor for You?
MK Wellness services are non-medical and not intended to diagnose, treat, cure, or prevent any condition. Dr. Tina Hills, D.O., and her team at PHMX provide medical evaluation and care. MK Wellness and PHMX are two separate, independent businesses. Never stop or change a prescribed medicine without talking with your doctor. If you have a medical emergency, call 911.
Put This Into Practice
The Cellular Health & Longevity Protocol at MK Wellness
We build this goal around modalities that work better together. The core of the protocol:
About MK Wellness
MK Wellness was founded by Danielle Cordova after years of searching for real answers for her own family. Our Insights follow The MK Way: root cause over symptoms, the whole body as one system, and honest reporting on what the evidence does and doesn't show. This article is for general education, not medical advice.
Read our story →The MK Way Letter
Root-cause wellness, in your inbox.
Dani's notes on functional health, recovery science, and the habits and tools we actually use, with honest takes on what the research shows. No spam, unsubscribe anytime.
Keep Reading
Ready to start your protocol?
Book at MK Wellness