Common Types of Autoimmune Diseases: A Complete Guide by Body System

Autoimmune diseases occur when the immune system mistakenly attacks the body’s own healthy cells and tissues instead of foreign invaders. More than 100 distinct autoimmune diseases have been identified, affecting an estimated 5–8% of the population, with women affected significantly more often than men. They’re commonly grouped by which body system they primarily affect: joints and muscles, skin and blood vessels, the digestive system, the endocrine system, and the nervous system. Most autoimmune diseases have no cure, but many can be managed effectively with medication, and some go into periods of remission.

The exact cause varies by condition and isn’t fully understood, but research points to a combination of factors:

• Genetics — family history increases risk for many autoimmune conditions, though inheritance patterns are complex rather than direct
• Environmental triggers — infections, certain medications, and environmental exposures (including UV light, chemicals, and solvents) have been linked to onset in genetically susceptible individuals
• Hormonal factors — the significantly higher prevalence in women suggests a hormonal component, though the exact mechanism is still being studied

Joints and muscles

• Rheumatoid arthritis (RA) — the immune system attacks the synovium (joint lining), causing chronic inflammation, pain, and progressive joint damage if untreated
• Myositis — inflammation and weakness in the muscles

[See our dedicated guide on rheumatoid arthritis and stem cell research.]

Skin and blood vessels

• Psoriasis — accelerated skin cell turnover causing scaling, red patches
• Vitiligo — loss of skin pigment cells, causing patches of lighter skin
• Scleroderma — abnormal thickening and hardening of skin and connective tissue, which can also affect internal organs
• Vasculitis — inflammation of blood vessels, which can range from mild to serious depending on which vessels are affected

[See our dedicated pages on vitiligo, scleroderma, and vasculitis.]

Digestive system

• Crohn’s disease — chronic inflammation that can affect any part of the digestive tract, most often the small intestine
• Ulcerative colitis — chronic inflammation limited to the colon and rectum
• Celiac disease — an immune reaction to gluten that damages the small intestine

[See our dedicated pages on Crohn’s disease and ulcerative colitis.]

Endocrine system

• Type 1 diabetes — the immune system attacks insulin-producing cells in the pancreas
• Hashimoto’s thyroiditis — underactive thyroid caused by immune-driven inflammation
• Graves’ disease — overactive thyroid caused by autoimmune stimulation
• Addison’s disease — immune attack on the adrenal glands, affecting hormone production

Nervous system and systemic conditions

• Multiple sclerosis (MS) — the immune system attacks the protective covering of nerve fibers, disrupting communication between the brain and body
• Systemic lupus erythematosus (lupus) — can affect skin, joints, kidneys, heart, brain, and blood cells, with symptoms ranging from mild to severe and a pattern of flares and remission
• Guillain-Barré syndrome — a rapid-onset condition affecting the peripheral nervous system

[See our dedicated page on lupus.]

While specific symptoms depend heavily on which condition and body system is involved, several symptoms appear frequently across many autoimmune diseases:

• Persistent fatigue
• Joint pain and swelling
• Low-grade fever
• Skin changes or rashes
• Digestive issues

Because symptoms often overlap across conditions and can be vague early on, autoimmune diseases are frequently challenging to diagnose and may take time and multiple specialists to properly identify.

Standard treatment approaches vary by condition but generally include:

• Immunosuppressive medications to reduce the immune system’s activity
• Biologic therapies targeting specific parts of the immune response
• Anti-inflammatory medications to manage symptom flares
• Condition-specific management — for example, hormone replacement in thyroid-related autoimmune conditions, or dietary management in celiac disease

There is currently no cure for most autoimmune diseases, but many people achieve significant symptom control, and some conditions can enter extended periods of remission with appropriate treatment.

Regenerative approaches, including mesenchymal stem cell therapy and exosome-based treatments, are an active area of research for several autoimmune conditions, explored for their potential to help modulate an overactive immune response. This research remains investigational overall — evidence varies significantly by specific condition, and it should be considered a supportive, evolving area of study rather than an established cure. Our condition-specific pages linked throughout this guide go into what the evidence currently shows for each disease individually, since the research landscape differs meaningfully between, for example, lupus and rheumatoid arthritis.

• Rheumatoid arthritis
• Systemic lupus
• Crohn’s disease
• Ulcerative colitis
• Vitiligo
• Scleroderma
• Vasculitis
• Psoriasis

Have questions about a specific autoimmune condition? Book a free case review and our medical team can walk you through your options and what current research shows for your specific diagnosis.

1. Facts About Autoimmune Diseases. Fred Hutchinson Cancer Center.
2. Autoimmune Diseases: Symptoms, Causes, Types & Treatment Guide. Healthline, medically reviewed.
3. Autoimmune disease. Wikipedia, citing UK prevalence data.