A to Z: Polymyositisenparentshttps://kidshealth.org/EN/images/headers/P-khAZDictionary-enHD-AR1.jpgPolymyositis is an uncommon disease that causes muscle weakness, pain, and inflammation. It usually affects adults.polymyositis, idiopathic inflammatory myopathy, chronic inflammatory myopathy, myositis, inflammatory muscle disease, skeletal muscle disease, muscle weakness, immune disorder05/29/201304/11/201909/02/20192fef4c52-abcc-4b67-bd59-a2678f7f0600https://kidshealth.org/ws/RadyChildrens/en/parents/az-polymyositis.html/<p><em>May also be called: Idiopathic Inflammatory Myopathy</em></p> <p>Polymyositis (pol-ee-my-uh-SY-tis) is an uncommon inflammatory disease that causes weakness, pain, and swelling in skeletal <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/bones-muscles-joints.html/">muscles</a> (voluntary muscles&nbsp;that connect bones). It is one of three diseases that are classified as chronic inflammatory myopathies or <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/az-myositis.html/">myositis</a>.</p> <h3>More to Know</h3> <p>Polymyositis can occur in people of all ages, but is most common in adults over the age of 30. Women are more likely to get the disease than men.</p> <p>With polymyositis, something causes the <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/immune.html/">immune system</a> to attack healthy muscle tissue. Muscles most affected by polymyositis include the hips, thighs, shoulders, neck, and upper arms.</p> <p>In addition to progressive muscle weakness, swelling and tenderness, people with polymyositis may have shortness of breath, fatigue, joint pain, fever, difficulty swallowing or speaking, loss of appetite, and weight loss. Symptoms appear very gradually, can vary greatly, and tend to get worse&nbsp;over time.</p> <p>There is no cure for polymyositis, but it can be treated with immunosuppressant medications and intravenous gamma globulin (a donated blood product with healthy antibodies). A doctor might also recommend <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/phys-therapy.html/">physical therapy</a> and <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/speech-therapy.html/">speech therapy</a> to help improve muscle function.</p> <h3>Keep in Mind</h3> <p>Polymyositis is a serious disease than can result in life-threatening complications such as heart disease, lung disease, and <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/pneumonia.html/">pneumonia</a>. With treatment, however, most people see improvement in their condition. Some might even experience remission (an absence of symptoms).</p> <p><em>All A to Z dictionary entries are regularly reviewed by KidsHealth medical experts.</em></p>
A to Z: MyositisLearn about causes of muscle weakness and conditions that affect muscles and muscle tissue.https://kidshealth.org/ws/RadyChildrens/en/parents/az-myositis.html/4e034de6-aeb9-4da3-ba35-9c7235034cb5
A to Z: TenosynovitisLearn about overuse injuries and conditions that affect the tendons and muscles.https://kidshealth.org/ws/RadyChildrens/en/parents/az-tenosynovitis.html/fe3b24f9-0712-4d30-90e2-b851737fd28e
Bones, Muscles, and JointsWithout bones, muscles, and joints, we couldn't stand, walk, run, or even sit. The musculoskeletal system supports our bodies, protects our organs from injury, and enables movement.https://kidshealth.org/ws/RadyChildrens/en/parents/bones-muscles-joints.html/53199934-b6d8-4854-8362-8b1dfc45c3f6
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