What is JIA?

JIA can occur in young people, up to age 16. Discover the differences in arthritis between young people and adults, how common arthritis is in young people, and how it can affect the joints.

The word arthritis comes from the Greek words “arthron” meaning joint, and “itis,” meaning inflammation.

A joint is where two bones are joined or come together. Inflammation occurs when the body reacts to infection, irritation or other injury. Symptoms of inflammation include redness, warmth, swelling and pain. Arthritis means you have inflammation in your joints.

Many people think that arthritis is something only older people get. Children and teenagers get a kind of arthritis called juvenile idiopathic arthritis (JIA). “Juvenile” means young (younger than 16 years old) and “idiopathic” means the cause is unknown. JIA is also sometimes called juvenile rheumatoid arthritis (JRA).

Here are some differences between arthritis in young people and arthritis in adults:

• Osteoarthritis, a common form of arthritis in adults, is not common in young people with JIA.
• It may take longer for young people with JIA to be diagnosed because many people (even some doctors) don’t realize young people can get arthritis.
• JIA in young people may affect their growth. If the JIA affects many joints or other body systems, they may grow more slowly overall. On the other hand, if only one joint such as the knee is affected, the inflammation can cause more blood flow to that joint and make that part of the body grow faster. Injury can also occur to the growth plates , which may cause growth to be slower in some children or teens.
• Children and teenagers with JIA may also get inflammation in their eyes.
Medications used to treat JIA are generally the same in all age groups. However, doses need to be adjusted for children and teenagers based on their weight.

How common is JIA?

The number of cases of juvenile arthritis is difficult to estimate because is it an uncommon condition. Based on self-reported data from the Australian Bureau of Statistics (ABS) 2014–15 National Health Survey (NHS), juvenile arthritis is estimated to affect at least one child in every 1,000 aged 0–15. It is more common in girls than boys.

How does JIA affect the joints?

Look at the illustration below of a healthy joint and a joint affected by JIA. See if you can pick out the differences between them.

               Normal vs. arthritic joint

In a healthy joint, a special sac called the articular capsule surrounds the space between two bones. The inner lining of this sac is called the synovial lining. The synovial lining makes a fluid that keeps the joint slippery. This fluid is similar to motor oil that keeps the parts of a car engine working properly. The ends of the bones are covered with a smooth substance called cartilage. The cartilage allows the bone ends to glide easily across each other.

In JIA, changes in the immune system cause the lining of the sac to become inflamed and thickened. Extra fluid is produced, which contains inflammatory cells. These inflammatory cells make and release substances that can cause the symptoms of joint inflammation. These symptoms include warmth, stiffness, swelling, and pain. If left untreated, joint inflammation can damage the cartilage and underlying bone.

Welcome to the Taking Charge: Managing JIA Online Program! In this section you will learn what to expect in the program, how to get started and how to set goals to better manage JIA.

JIA stands for juvenile idiopathic arthritis. Find out what causes JIA, the different types of JIA and how it will affect you now and in the future.

Diagnosing JIA may be difficult as joint pain and swelling may be a part of many different illnesses. Diagnosis of JIA typically includes a physical exam, blood tests and imaging studies.

Pain, stiffness, and tiredness or fatigue, are common symptoms of JIA. These symptoms can lead to difficulties with participating in school and sports activities, and enjoying time with your friends. Learn about pain, fatigue, and stiffness, how to manage symptoms and how these symptoms can cause stress.

There are several strategies you can use to help you cope with pain, stress, and sleep problems. These include relaxation, distraction, and managing your thoughts. In this section, learn more about how each of these strategies work.

When you know about your medications, you can talk to your doctor about them and make good choices for yourself. Find out about the different types of JIA medications, how they work, common side effects, and the importance of talking to your doctor about your medication plan.

Did you know that there are many other therapies that you can use to manage JIA symptoms? They can help to prevent complications so that you can do all the things you want to do. In this section, learn more about physical, occupational, and psychological therapies; maintaining healthy nutrition; surgical options for JIA, and more.

Your role in making decisions about your treatment plan is very important. Your health-care team and other members of your support system are available to help you make these decisions. In turn, they can help you to manage your JIA.

Whether you have JIA or not, you need to maintain a healthy lifestyle. Find out how to stay healthy and active, learn about puberty and relationships, healthy body image, and making healthy lifestyle choices.

Sometime between the ages of 18 to 22, you most likely will transition from your pediatric rheumatologist to the adult health care setting. At that time, there are a number of things you, your family, and your health-care team can do to help make this change go smoothly.