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Mastitis What is mastitis? Mastitis is an inflammation of the breast tissue. Infections may or may not occur with mastitis. It often affects people who are breastfeeding. What causes mastitis? Mastitis may occur because of sore or cracked nipples, latch problems, plugged ducts

Generalized Anxiety Disorder (GAD) What is generalized anxiety disorder? Generalized anxiety disorder (GAD) is a mental health condition that causes you to worry a lot. The worry can feel out of your control. And you might have a hard time sleeping and feel irritable or on edge

Diphtheria What is diphtheria? Diphtheria is an illness caused by bacteria. There are two types: Respiratory diphtheria. This type affects the throat, nose, and tonsils. Skin (cutaneous) diphtheria. This type affects the skin. It was a common childhood disease in the past. A

Fibromyalgia What is fibromyalgia? Fibromyalgia is a condition that causes pain in muscles and soft tissues all over the body. It is an ongoing (chronic) condition. It can affect your neck, shoulders, back, chest, hips, buttocks, arms, and legs. The pain may be worse in the

Ataxia Telangiectasia (A-T) What is ataxia telangiectasia (A-T)? Ataxia telangiectasia is a rare childhood disease that affects the nervous system, immune system, and other body systems. It is an inherited disease. The symptoms of A-T often begin to show up by age 5. How to say

Polio (Poliomyelitis) What is polio? Poliomyelitis is commonly called polio. It's an infectious disease. It is caused by 1 of 3 types of poliovirus. Polio is easily spread from person to person. The poliovirus is a virus that can cause paralysis. But most people who are infected

Scoliosis in Children What is scoliosis in children? Scoliosis is a deformity of the backbone (spine). It's when the spine has a side-to-side curve. The curve of the spine measures 10 degrees or more. A normal spine appears straight when looked at from behind. But a child with

Legg-Calvé-Perthes Disease in Children What is Legg-Calvé-Perthes disease in children? Legg-Calvé-Perthes disease (or Perthes disease) is a rare hip condition that affects children. Over a number of years, the ball-shaped top of a child's thighbone (femoral head) breaks down and

Cytomegalovirus (CMV) in Newborns What is CMV in newborns? CMV (cytomegalovirus) is a type of herpes virus. It's very common. It affects people of all ages and in all parts of the U.S. In most cases, CMV causes mild symptoms, or no symptoms at all. But it can cause serious