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Rheumatic Fever What is rheumatic fever? Rheumatic fever is a complex disease that affects the joints, skin, heart, blood vessels, and brain. It happens mainly in children between the ages of 5 and 15. It's an autoimmune disease that occurs after an infection with strep

Chickenpox What is chickenpox? Chickenpox is a common childhood disease. It causes an itchy, blistering rash and is easily spread to others. Until the varicella vaccine for chickenpox became available in 1995, chickenpox infection was very common. Almost everyone had been

Neurogenic Bladder in Children What is neurogenic bladder in children? Neurogenic bladder means the bladder doesn't work normally because of nerve damage. It causes a child to have problems with holding or releasing urine. The muscles and nerves of the urinary system work

Juvenile Ankylosing Spondylitis (JAS) in Children What is juvenile ankylosing spondylitis in children? Juvenile ankylosing spondylitis is a type of arthritis. It affects the spine and the places where the muscles, tendons, and ligaments attach to the bone. Ankylosing means stiff

Male Infertility What is male infertility? Gender words are used here to talk about anatomy and health risk. Please use this information in a way that works best for you and your doctor as you talk about your care. Infertility is a disease of the reproductive system. It makes a

Addison Disease in Children What is Addison disease in a child? Addison disease, also called primary adrenal insufficiency, is a rare autoimmune endocrine disorder that occurs when the adrenal glands don't make enough of the "stress" hormone called cortisol. Cortisol controls

Herpes Simplex Virus (Cold Sores) in Children What are cold sores in children? Cold sores are small blisters around the mouth caused by the herpes simplex virus. They are sometimes called fever blisters. What causes cold sores in a child? The most common cause of cold sores is

X-Linked Agammaglobulinemia in Children What is X-linked agammaglobulinemia in children? X-linked agammaglobulinemia is a rare genetic disease. It causes a weakened immune system. It is also known as Bruton's agammaglobulinemia. X-linked means that the gene that causes this

Growth Hormone Deficiency in Children What is growth hormone deficiency in children? Growth hormone (GH) deficiency is when the pituitary gland doesn't make enough growth hormone. GH is needed to stimulate growth of bone and other tissues. This condition can occur at any age. It

High Blood Pressure: Hypertension What is high blood pressure? Blood pressure is the force of the blood pushing against the artery walls. The force is made with each heartbeat as blood is pumped from the heart into the blood vessels. This is called systolic blood pressure. Blood