What Are Autoimmune Diseases?

An autoimmune disease develops when the immune system mistakenly recognises part of the body's own tissues as foreign and mounts an immune response against them.

Instead of protecting the body from infection, the immune system begins attacking healthy cells.

Depending on which organs are affected, autoimmune diseases may cause a wide variety of symptoms and clinical presentations.

Some primarily affect a single organ.

Others involve multiple body systems.

Although each autoimmune disease is different, they all share one important characteristic:

The immune system loses part of its normal ability to distinguish between "self" and "non-self."

Autoimmune Diseases Are More Common Than Many People Realise

More than eighty autoimmune diseases have been identified.

Collectively, they affect millions of people worldwide and represent an important cause of chronic illness.

Some of the most recognised autoimmune diseases include:

• Hashimoto's thyroiditis.
• Graves' disease.
• Rheumatoid arthritis.
• Systemic lupus erythematosus.
• Multiple sclerosis.
• Coeliac disease.
• Psoriasis.
• Psoriatic arthritis.
• Type 1 diabetes.
• Sjögren's syndrome.

Each condition affects different tissues and follows its own clinical course.

For this reason, there is no single treatment approach that applies to every autoimmune disease.

Why Do Autoimmune Diseases Develop?

Despite decades of research, no single cause has been identified.

Current scientific understanding suggests that autoimmune diseases arise through a complex interaction between several factors.

These may include:

• Genetic susceptibility.
• Immune system regulation.
• Hormonal influences.
• Environmental exposures.
• Certain infections.
• Smoking.
• Lifestyle factors.

Researchers continue to investigate how these elements interact throughout life.

Importantly, having a genetic predisposition does not necessarily mean that an autoimmune disease will develop.

Genes may increase susceptibility, but they do not determine destiny.

Why Many Patients Explore Functional Medicine

Living with an autoimmune disease often involves long-term medical care.

Symptoms may fluctuate.

Periods of stability may alternate with disease flare-ups.

Patients frequently seek ways to better understand their condition and improve their overall health.

Functional medicine has gained attention because it often encourages physicians to evaluate broader aspects of health, including:

• Nutrition.
• Physical activity.
• Sleep.
• Stress.
• Digestive health.
• Lifestyle habits.

These factors can influence general health and quality of life.

However, they should always be considered alongside established medical diagnosis, evidence-based treatment and regular follow-up with appropriately qualified physicians.

Lifestyle optimisation complements good medical care.

It does not replace it.

Autoimmune Diseases Require Accurate Diagnosis

Many autoimmune diseases share similar symptoms.

Fatigue.

Joint pain.

Skin changes.

Digestive complaints.

Muscle weakness.

Dry eyes or mouth.

Because these symptoms overlap with many other medical conditions, accurate diagnosis requires careful clinical assessment.

Depending on the patient's presentation, physicians may recommend:

• Blood tests.
• Autoantibody testing.
• Imaging studies.
• Organ-specific investigations.
• Referral to a rheumatologist, endocrinologist, gastroenterologist, neurologist or other specialist.

An early and accurate diagnosis helps guide appropriate treatment while reducing the risk of long-term complications.

Dr. Indhira Ghyssaert's Approach

Dr. Indhira Ghyssaert believes that caring for patients with autoimmune diseases requires a thoughtful combination of evidence-based medicine, careful clinical assessment and personalised healthcare.

Every patient has a unique medical history, symptom pattern, lifestyle and health priorities.

Her consultations begin by understanding the whole person rather than focusing solely on the diagnosis.

Where lifestyle factors such as nutrition, sleep, physical activity or stress management may contribute to overall wellbeing, these are discussed within the context of current scientific evidence.

Medical treatment remains central to the management of autoimmune diseases, while preventive healthcare and lifestyle optimisation help support long-term health and quality of life.

Can Lifestyle Influence Autoimmune Diseases?

One of the most common questions patients ask is whether lifestyle can influence autoimmune diseases.

Current scientific evidence suggests that the answer is yes—but within important limits.

Lifestyle does not replace the immune system.

Nor can it eliminate autoimmune diseases.

However, factors such as nutrition, physical activity, sleep, smoking and stress may influence overall health, symptom burden and quality of life in many individuals living with autoimmune conditions.

This is why modern medicine increasingly recognises lifestyle as an important component of comprehensive care.

The objective is not to replace evidence-based treatment.

It is to complement it.

Functional Medicine and Autoimmunity

Functional medicine often encourages physicians to look beyond the diagnosis itself.

Rather than asking only,

"Which autoimmune disease does this patient have?"

it may also ask:

• How is the patient sleeping?
• Is nutrition adequate?
• Are there modifiable cardiovascular risk factors?
• How active is the patient?
• Is chronic stress affecting overall wellbeing?
• Are there other medical conditions contributing to symptoms?

These questions are valuable.

In fact, many are also central to preventive medicine and lifestyle medicine.

Where caution is required is in assuming that every autoimmune disease has one hidden "root cause" that can be identified and removed.

Current scientific evidence does not support such a simplified view.

Autoimmune diseases are biologically complex and usually result from multiple interacting genetic, immunological and environmental factors.

Nutrition and Autoimmune Health

Nutrition plays an important role in maintaining general health for everyone, including people living with autoimmune diseases.

A balanced dietary pattern supports overall wellbeing, helps reduce cardiovascular risk and contributes to maintaining a healthy body weight.

For certain autoimmune diseases, specific dietary recommendations are clearly supported by evidence.

For example:

• People with coeliac disease require a strict lifelong gluten-free diet.
• Individuals receiving corticosteroids may benefit from nutritional strategies that help maintain bone health.
• Patients with autoimmune diseases affecting the digestive tract may require assessment for nutritional deficiencies.

Outside these situations, no single "autoimmune diet" has been shown to benefit all autoimmune diseases.

Dietary advice should therefore be individualised rather than based on universal restrictions.

The Gut Microbiome and Autoimmune Diseases

Research into the gut microbiome has generated considerable interest in autoimmune medicine.

Scientists have observed associations between changes in the intestinal microbiome and several autoimmune diseases.

However, an important distinction must be made.

Association does not necessarily mean causation.

Researchers continue to investigate whether changes in the microbiome contribute to autoimmune diseases, result from them or simply occur alongside them.

This remains one of the most exciting areas of immunology.

It is also one of the areas where much remains to be discovered.

For this reason, claims that microbiome manipulation alone can reverse autoimmune disease should be viewed with caution.

Chronic Inflammation Is Not the Same as Autoimmune Disease

The word "inflammation" has become extremely popular in health discussions.

However, inflammation is a normal biological response.

It helps the body fight infection and repair injured tissues.

Autoimmune diseases involve abnormalities of immune regulation that may include inflammation, but the two concepts are not interchangeable.

Not every inflammatory condition is autoimmune.

Not every autoimmune disease behaves in the same way.

Understanding this distinction is essential for accurate diagnosis and appropriate treatment.

Stress, Sleep and Physical Activity

Living with a chronic autoimmune disease can be physically and emotionally demanding.

Although stress does not directly cause autoimmune diseases, it may influence symptom perception, fatigue, sleep quality and overall wellbeing.

Similarly, poor sleep may reduce quality of life and contribute to daytime fatigue.

Appropriate physical activity, adapted to the individual's health status, may provide important benefits for cardiovascular health, mobility and mental wellbeing.

These lifestyle factors cannot replace medical treatment.

They can, however, support comprehensive long-term care.

The Importance of Continuing Medical Treatment

One of the greatest risks patients face is abandoning evidence-based medical treatment after reading unsupported claims online.

Autoimmune diseases may cause progressive organ damage if left untreated.

For many conditions, early diagnosis and appropriate medical therapy substantially improve long-term outcomes.

Lifestyle optimisation should therefore be viewed as an addition to—not a replacement for—established medical care.

Decisions regarding treatment should always be made together with the physician responsible for managing the autoimmune disease.

Dr. Indhira Ghyssaert's Approach

Dr. Indhira Ghyssaert believes that every patient living with an autoimmune disease deserves comprehensive, physician-led care that considers both the disease and the individual.

Her consultations evaluate the broader picture.

Medical history.

Lifestyle.

Nutrition.

Sleep.

Physical activity.

Current treatment.

Personal health goals.

Where lifestyle modifications may support overall wellbeing, these are discussed within the context of current scientific evidence and never as substitutes for appropriate medical treatment.

Her objective is to help patients optimise their overall health while working collaboratively with specialist physicians involved in their care

Living Well with an Autoimmune Disease

Receiving a diagnosis of an autoimmune disease often raises many questions.

Will my condition worsen?

Can it be cured?

Will I need lifelong treatment?

How will it affect my future?

Although every autoimmune disease is different, advances in modern medicine have significantly improved the outlook for many patients.

Earlier diagnosis.

More targeted therapies.

Improved disease monitoring.

Better understanding of lifestyle factors.

Together, these advances allow many individuals to live active, productive and fulfilling lives.

The objective of healthcare is not only to control disease activity.

It is also to preserve function, protect long-term health and support quality of life.

Autoimmune Diseases Require Long-Term Partnership

Unlike many acute illnesses, autoimmune diseases often require ongoing medical care.

Symptoms may change over time.

Treatments may need adjustment.

New research continues to improve medical understanding.

For this reason, long-term follow-up remains an essential part of good healthcare.

Patients benefit most when physicians, specialists and the individual work together as partners.

Good communication.

Shared decision-making.

Regular review.

These remain some of the most important elements of successful long-term care.

Frequently Asked Questions

Can functional medicine cure autoimmune diseases?

There is currently no scientific evidence that functional medicine can cure autoimmune diseases.

However, several principles commonly associated with functional medicine—including nutrition, physical activity, sleep optimisation and personalised lifestyle interventions—may support overall health and quality of life when integrated with evidence-based medical care.

These approaches should complement, not replace, established medical treatment.

Can lifestyle influence autoimmune diseases?

Yes.

Although lifestyle cannot eliminate autoimmune disease, healthy lifestyle habits may contribute to improved wellbeing, cardiovascular health, physical function and fatigue management in many individuals.

Lifestyle optimisation should always be tailored to the individual and discussed within the context of their overall medical care.

Is every autoimmune disease the same?

No.

More than eighty autoimmune diseases have been identified.

Each affects different organs, follows its own clinical course and requires individual assessment and management.

Treatment recommendations vary according to the specific diagnosis and the patient's circumstances.

Can diet reverse autoimmune disease?

For most autoimmune diseases, there is currently no evidence that one specific diet can reverse the disease process.

Some conditions, such as coeliac disease, require highly specific dietary treatment.

For many others, balanced nutrition supports overall health but should not be presented as a cure.

When should I seek medical assessment?

Persistent joint pain, unexplained fatigue, prolonged skin rashes, muscle weakness, chronic digestive symptoms, unexplained weight loss, recurrent mouth ulcers, prolonged fever or other persistent symptoms should always be assessed by a qualified physician.

Early diagnosis often improves long-term management and helps reduce the risk of complications.

Common Misconceptions

Myth

"Every autoimmune disease has one hidden root cause."

Reality

Autoimmune diseases develop through complex interactions between genetics, immune regulation and environmental influences.

Current scientific evidence does not support the existence of one universal root cause.

Myth

"Natural therapies can replace medical treatment."

Reality

Lifestyle interventions may support overall health, but they should complement—not replace—evidence-based medical treatment prescribed by qualified physicians.

Myth

"Autoimmune diseases always get worse."

Reality

Many autoimmune diseases can be effectively managed.

Early diagnosis, appropriate treatment and regular medical follow-up have substantially improved outcomes for many patients.

Myth

"Inflammation and autoimmune disease are the same thing."

Reality

Inflammation is a normal biological process.

Autoimmune diseases involve abnormal immune regulation and may include inflammation, but the two concepts are not interchangeable.

Key Takeaways

• Autoimmune diseases occur when the immune system mistakenly attacks healthy tissues.
• They are complex conditions with multiple interacting biological and environmental influences.
• Functional medicine highlights important aspects of lifestyle and personalised care, but recommendations should always remain grounded in scientific evidence.
• Nutrition, sleep, physical activity and stress management may support overall wellbeing alongside evidence-based medical treatment.
• The most effective care combines accurate diagnosis, appropriate specialist management and a personalised, physician-led approach.

Dr. Indhira Ghyssaert's Philosophy

Dr. Indhira Ghyssaert believes that patients living with autoimmune diseases deserve more than symptom management alone.

They deserve to understand their condition.

To participate in decisions about their care.

And to receive medical guidance that considers both the disease and the individual.

Her consultations begin with careful listening and comprehensive clinical assessment.

Medical history.

Lifestyle.

Nutrition.

Sleep.

Physical activity.

Current treatment.

Personal health goals.

Every recommendation is based on current scientific evidence and developed in collaboration with the patient's wider healthcare team whenever appropriate.

Rather than promoting unrealistic promises, Dr. Ghyssaert focuses on helping patients optimise their overall health, reduce avoidable risk factors and make informed decisions that support long-term wellbeing.

For her, excellent medical care is built on knowledge, honesty and partnership.

About Dr. Indhira Ghyssaert

Dr. Indhira Ghyssaert is a licensed General Practitioner providing physician-led private medical consultations in Mallorca.

She has a particular interest in preventive medicine, personalised healthcare, lifestyle medicine and supporting patients living with complex chronic conditions.

Her approach integrates evidence-based medicine with comprehensive clinical assessment, helping international residents, second-home owners and visitors better understand their health while working collaboratively with specialist physicians whenever required.

Medical Disclaimer

This guide is intended for educational purposes only and should not replace an individual medical consultation.

Autoimmune diseases require accurate diagnosis and, in many cases, long-term specialist management.

Treatment decisions should always be based on a comprehensive medical assessment and current evidence-based clinical guidelines.

Patients should never stop prescribed medication or make significant treatment changes without first discussing them with their treating physician.

Related Articles

Continue exploring our Physician's Guide to Functional Medicine and Personalised Healthcare:

• What Is Functional Medicine?
• Functional Medicine and Gut Health
• Functional Medicine and Chronic Fatigue
• Functional Medicine and Thyroid Disorders
• Functional Medicine and Inflammation
• Lifestyle Medicine Explained
• Preventive Medicine in Mallorca
• General Practitioner (GP) in Mallorca

Request a Consultation

If you have been diagnosed with an autoimmune disease or are experiencing symptoms that may require medical assessment, you may request a consultation with Dr. Indhira Ghyssaert.

Following a comprehensive physician-led evaluation, she will assess your medical history, current treatment, lifestyle and overall health, working collaboratively with specialist colleagues whenever appropriate to support evidence-based, personalised care.

The objective is always the same:

To help you better understand your condition, optimise your overall health and make informed medical decisions based on science, clinical judgement and compassionate care.

Scientific References

1. European Alliance of Associations for Rheumatology (EULAR). Recommendations for the Management of Rheumatic and Autoimmune Diseases.
2. American College of Rheumatology (ACR). Clinical Practice Guidelines.
3. National Institute for Health and Care Excellence (NICE). Autoimmune Disease Guidelines.
4. World Health Organization (WHO). Integrated People-Centred Health Services.
5. National Academy of Medicine. Implementing High-Quality Primary Care.
6. Sackett DL, et al. Evidence-Based Medicine: What It Is and What It Isn't. BMJ.
7. World Medical Association. International Code of Medical Ethics.