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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

Sprains and Strains in Children What are sprains and strains in children? Sprains and strains are types of injuries. A sprain is an injury to a ligament while a strain is an injury to a muscle or tendon. Ligaments and tendons are made of fibrous tissue. They connect different

Allergies in Children What are allergies in children? Allergies are problems of the immune system. Most allergic reactions happen when the immune system reacts to a “false alarm.” Normally, the human body defends itself against harmful things, such as viruses or bacteria. But

Microcephaly in Children What is microcephaly in children? Microcephaly is a condition where a baby's head is much smaller than normal. It is most often present at birth (congenital). Most children with microcephaly also have a small brain and an intellectual disability. Some

Spinal Muscular Atrophy in Children What is spinal muscular atrophy in children? Spinal muscular atrophy (SMA) is a disease of the nerves and muscles caused by certain genes. It affects the motor neurons in the spinal cord. It causes muscle wasting and weakness. What causes

Sexually Transmitted Infections in Teens What are sexually transmitted infections (STIs)? Sexually transmitted infections (STIs) are infectious diseases spread through sexual contact. About 50 out of 100 new STIs happen in people ages 15 to 24. Protecting your teen from STIs The

Undescended Testes in Children What are undescended testes in children? Undescended testes means that 1 or both of the male testes have not passed down (descended) into the scrotal sac. This is a condition seen in some newborn baby boys. Most cases affect only 1 teste. About 1 in

Beta Thalassemia in Children What is beta thalassemia in children? Beta thalassemia is an inherited blood disorder. This means it's passed down through a parent’s genes. It's a form of anemia. Anemia is a low red blood cell or low hemoglobin level. Hemoglobin is part of red blood

Respiratory Syncytial Virus (RSV) in Children What is respiratory syncytial virus (RSV) in children? RSV is a viral illness that causes symptoms such as trouble breathing. It’s the most common cause of inflammation of the small airways in the lungs (bronchiolitis) and pneumonia

Tourette Disorder in Children What is Tourette disorder in children? Tourette disorder (TD) is a neurological disorder. It is also called Tourette syndrome. The disorder causes repeated tics. Tics are sudden, uncontrolled vocal sounds or muscle jerks. Symptoms of TD often start