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Color Blindness What is color blindness? Color blindness is when you see colors differently than most people do. The retina is the light-sensitive lining in the back part of your eye. It sends visual information to your brain. Your retina has special cells that detect color

Guillain-Barré Syndrome in Children What is Guillain-Barré syndrome in children? Guillain-Barré syndrome (GBS) is a short-term but often life-threatening disorder that affects the nerves in the body. GBS can cause muscle weakness, pain, and short-term paralysis of the muscles in

Common Variable Immunodeficiency in Children What is common variable immunodeficiency in children? Common variable immunodeficiency (CVID) is an immunodeficiency problem that causes a child to have a low level of antibodies and a decreased responsiveness to some vaccines. This

Delayed Puberty What is delayed puberty? Puberty that happens late is called delayed puberty. This means a child's physical signs of sexual maturity don't appear by age 12 to 13 in girls or age 13 to 14 in boys. This includes breast or testicle growth but can also include pubic

Helicobacter Pylori in Children What is H. pylori (Helicobacter pylori) in children? H. pylori is a spiral-shaped germ (bacteria) that infects the stomach. It can damage the tissue in your child's stomach and the first part of the small intestine (duodenum). This can cause

Pelvic Inflammatory Disease (PID) What is pelvic inflammatory disease (PID)? Pelvic inflammatory disease (PID) is an infection of a woman’s reproductive tract. It can affect the uterus, fallopian tubes, and the ovaries. PID can cause scar tissue that grows between internal organs

Appendicitis What is appendicitis? Appendicitis is a medical emergency. It happens when your appendix becomes sore, swollen, and diseased. The appendix is a thin tube that is joined to the large intestine. It sits in the lower right part of your belly (abdomen). The appendix is a

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

Toxic Shock Syndrome (TSS) What is toxic shock syndrome? Toxic shock syndrome (TSS) is an illness that produces symptoms in many systems of the body. Certain bacterial infections release toxins into the bloodstream. These toxins can spread to many body organs. This can cause