A to Z: Myositisenparentshttps://kidshealth.org/EN/images/headers/P-khAZDictionary-enHD-AR1.jpgLearn about causes of muscle weakness and conditions that affect muscles and muscle tissue.myositis, polymyositis, dermatomyositis, inclusion body myositis, juvenile dermatomyositis, muscles, muscle inflammation, dysphagia, hips, shoulders, skin rashes, immune system, skeletal muscles01/11/201304/09/201909/02/20194e034de6-aeb9-4da3-ba35-9c7235034cb5https://kidshealth.org/ws/RadyChildrens/en/parents/az-myositis.html/<p>Myositis (my-uh-SY-tis) is inflammation of the <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/bones-muscles-joints.html/">muscles</a> that can be caused by many conditions and diseases that make muscles weak, swollen, and irritated.</p> <h3>More to Know</h3> <p>In all types of myositis, something causes the <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/immune.html/">immune system</a> to attack healthy muscle tissue. This can be due to infection, trauma, a drug reaction, or an autoimmune-related disease, and can&nbsp;cause muscle weakness, swelling, and pain. In rare cases, myositis that affects neck or chest&nbsp;muscles can make it hard to swallow or breathe.</p> <p>Myositis can range from mild to severe. Some cases cause only mild weakness and may go away on their own, especially if due to a&nbsp;<a href="https://kidshealth.org/ws/RadyChildrens/en/parents/az-viral.html/">viral infection</a>. Other cases can make routine movements difficult and may cause long-term medical problems if left untreated.</p> <h3>Keep in Mind</h3> <p>There is no cure for myositis, but in most cases, treatment with rest, good fluid intake, and sometimes medications can limit the damage to muscle tissue and help increase strength. If myositis is due to an autoimmune disease, proper treatment can keep the disease under control.</p> <p><em>All A to Z dictionary entries are regularly reviewed by KidsHealth medical experts.</em></p>
A to Z: PolymyositisPolymyositis is an uncommon disease that causes muscle weakness, pain, and inflammation. It usually affects adults.https://kidshealth.org/ws/RadyChildrens/en/parents/az-polymyositis.html/2fef4c52-abcc-4b67-bd59-a2678f7f0600
ArthritisKids can get a kind of arthritis that causes joint pain. Find out more in this article for kids.https://kidshealth.org/ws/RadyChildrens/en/kids/juv-rheum-arthritis.html/8d74d9e3-5b65-49cb-86b1-f03a78d98bb9
Immune SystemThe immune system, composed of special cells, proteins, tissues, and organs that protect against germs and microorganisms, is the body's defense against disease.https://kidshealth.org/ws/RadyChildrens/en/parents/immune.html/d5495b69-ecfe-4b16-a87f-a9f5664e71d6
Juvenile Idiopathic ArthritisIn juvenile idiopathic arthritis (also called juvenile rheumatoid arthritis)), a person can develop swollen, warm, and painful joints. Learn more.https://kidshealth.org/ws/RadyChildrens/en/parents/jra.html/64ceaa10-23cf-4f1c-b6e0-21bd7cb07b97
Juvenile Idiopathic Arthritis (JIA)Learn about juvenile idiopathic arthritis, a specific kind of arthritis that usually occurs in kids and teens younger than 17.https://kidshealth.org/ws/RadyChildrens/en/teens/juv-rheumatoid-arthritis.html/f118a90b-88e2-491c-bad2-24a8ef6e2144
LupusLupus is a disease that affects the immune system. Learn how lupus is treated, signs and symptoms, how to support a friend who has it, and more.https://kidshealth.org/ws/RadyChildrens/en/teens/lupus.html/52e90cd8-e8a3-41ef-a32b-0bd6898db239
Your Immune SystemThe immune system keeps you healthy. How does it work? Find out in this article for kids.https://kidshealth.org/ws/RadyChildrens/en/kids/immune.html/6b9fad76-c866-450e-81d9-1e625343744f