Simple Teachings: Autoimmune Diseases

Your body's immune system is like a security guard that protects your body from infections and diseases. Unfortunately, your immune system can go awry and mistakenly attack healthy cells in your body. This is called an autoimmune disorder. It is still not clear exactly what causes autoimmune disorders and they can be genetic though and run in families.

What Are the Causes of Autoimmune Diseases?

Under normal circumstances, the immune system's white blood cells will protect your body from harmful substances, including viruses, bacteria, cancer cells, and toxins. After the onset of an autoimmune disease, your immune system cripples and fails to differentiate between healthy body tissues and antigens (bacteria, viruses, etc.).This leads to an immune response that destroys healthy body tissues.

Many factors can trigger autoimmune reactions. For instance:

• Sometimes a normal body substance changes shapedue to a drug, virus, radiation, or sunlight and is taken as foreign body by your immune system. These virus-infected cells may trigger your immune system to attack.
• A foreign substance that looks like a natural body substance enters the body and the immune system targets the similar body substance along with the foreign substance leading to autoimmune reactions.
• In some cases, B cells, a type of white blood cell, malfunction and overload your body with abnormal antibodies that start attacking some of the body' healthy cells.
• A substance that may be in the body but is usually hidden from the immune system may trigger autoimmune response when it enters into the blood stream. For instance, if something hits your eye and the fluid in your eyeball enters your bloodstream, this will produce an autoimmune response, as the immune system will take it as a foreign substance.

In addition to these, there are many other situations when it is not evident exactly what triggers an autoimmune reaction or disease. Heredity has a role to play here, as some people are usually born with genes that make them vulnerable to autoimmune disorders.

What Are the Most Common Autoimmune Diseases?

There are more than 80 types of autoimmune diseases, and some of the most common ones are mentioned below.

Autoimmune Disease	Description
Rheumatoid Arthritis	The immune system cells attack the joint and produce swelling, inflammation, and pain. If left untreated, it may lead to permanent joint damage.
Systemic Lupus Erythematosus (Lupus)	The disorder produces autoimmune antibodies that attach themselves to tissues in your body and affect the joints, blood cells, lungs, kidneys, and nerves.
Inflammatory Bowel Disease	The immune system starts destroying the lining of the intestines that may lead to diarrhea, urgent bowl movements, rectal bleeding, fever, abdominal pain, and weight loss. Crohn's disease and Ulcerative colitis are also the forms of inflammatory bowel disease.
Multiple Sclerosis	In this disorder, your immune system destroys nerve cells, causing blindness, pain, poor coordination, weakness and muscle spasms.
Type 1 Diabetes Mellitus	Your immune system attacks and destroys insulin-producing cells in your pancreas and lead to diabetes mellitus.
Guillain-Barre Syndrome	In this autoimmune disease, the immune system destroys your nerves that control muscles in the legs. It may also affect the nerves in the arms and upper body.
Psoriasis	You suffer from psoriasis when immune system blood cells (T-Cells) start accumulating in the skin. This often produces silvery, scaly plaque on your skin.
Graves' Disease	In this disease, the immune system affects your thyroid gland and increases the level of thyroid hormone in your blood. The symptoms include weight loss, bulging eyes, rapid heart rate, nervousness, and brittle hair.
Hashimoto's Thyroiditis	The immune system attacks and destroys the cells that produces thyroid hormone, leading to symptoms such as constipation, fatigue, depression, weight gain, dry skin, etc.
Myasthenia Gravis	The immune system produces antibodies that attach to nerves and restrict their ability stimulate muscles.
Vasculitis	Your blood vessels are usually the target of the immune system in this autoimmune disorder.

What Are the Common Symptoms of Autoimmune Diseases?

As there are so many types of autoimmune deficiency disorders, the symptoms vary a lot. The symptoms may differ a bit because autoimmune diseases can affect different parts of your body, including joints, muscles, red blood cells, skin, endocrine glands, and connective tissues. The most common symptoms include fever, fatigue, and general feeling of being unwell. Whatever the symptoms, they tend to get worse during flare-ups.

When to See a Doctor

It is important to get in touch with your doctor as soon as you develop some symptoms of an autoimmune disorder.

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