Overview
In autoimmune diseases, the immune system, which normally defends the body from infections, reacts against the body itself. This can lead to inflammation, pain, and damage in specific organs or throughout the body. Examples include type 1 diabetes, rheumatoid arthritis, lupus, multiple sclerosis, celiac disease, and autoimmune thyroid disease.
Key Symptoms
Symptoms vary depending on which body part is affected. Common symptoms include ongoing fatigue, joint pain or swelling, muscle aches, skin rashes, digestive problems, numbness, weakness, fever, and weight changes. Some people have mild symptoms, while others have flares that interfere with daily life.
Causes and Risk Factors
The exact cause of most autoimmune diseases is not fully understood. They likely result from a mix of genetic tendency and environmental triggers such as infections, smoking, some medicines, or other exposures. In some people, hormones may also play a role, and having one autoimmune disease can increase the chance of developing another.
Who Is Affected
Autoimmune diseases can affect children and adults of any sex, ethnic background, or region. Some are more common in women, and some tend to run in families. Different autoimmune diseases are more common in different age groups and populations.
Prevention
There is no known way to prevent all autoimmune diseases. Reducing known risks may help in some cases, such as avoiding smoking and getting regular medical care for ongoing symptoms. Early evaluation may help limit complications by finding organ involvement sooner.
Diagnosis and Tests
Diagnosis usually starts with a medical history, symptom review, and physical exam. A healthcare professional may order blood tests to look for inflammation, antibodies, hormone changes, or blood cell problems, along with urine tests or imaging depending on symptoms. Because symptoms can overlap with infections and other illnesses, diagnosis may require time and referral to a specialist.
Treatment Categories
Treatment depends on the specific disease and organs involved. Common approaches include medicines that reduce inflammation or calm immune system activity, hormone replacement for some gland problems, physical therapy, and monitoring for organ damage. Care plans are often adjusted over time based on symptoms, test results, and treatment side effects.
Living With It
Many people live with autoimmune diseases for years and need ongoing follow-up. Tracking symptoms, flares, triggers, and medicine side effects can help with medical visits. Emotional stress, pain, and uncertainty are common, so mental health support and social support can be an important part of care.
Diet and Lifestyle
Healthy daily habits can support overall well-being, even though they do not replace medical care. Regular sleep, physical activity suited to your ability, avoiding tobacco, managing stress, and following any condition-specific eating guidance may help some people feel better. Before making major diet changes or using supplements, speak with a qualified healthcare professional.
When to Seek Medical Care
Seek medical care if you have ongoing fatigue, unexplained pain, joint swelling, repeated rashes, weakness, numbness, persistent digestive symptoms, or symptoms that keep returning. You should also get medical attention for new symptoms after being diagnosed, or if treatment is not helping. Early review is especially important if symptoms affect breathing, movement, vision, urination, or blood sugar control.
When It May Be an Emergency
Get urgent help right away for trouble breathing, chest pain, severe weakness, confusion, seizures, severe dehydration, sudden vision changes, or signs of stroke such as facial drooping, arm weakness, or trouble speaking. Emergency care is also needed for severe allergic reactions, very high or very low blood sugar symptoms, or heavy bleeding. Some autoimmune diseases can rapidly affect the brain, lungs, kidneys, blood, or heart.
Questions to Ask a Healthcare Professional
You may want to ask what condition is being considered, what tests are needed, which organs may be affected, and what warning signs need urgent attention. It can also help to ask how treatment will be monitored, what side effects to watch for, and whether you should see a specialist. If you have more than one health condition, ask how they may affect each other.