Health Library

Age-Appropriate Speech and Hearing Milestones

A helpful look at age-appropriate hearing milestones for babies and toddlers.

AIDS-Related Lymphoma in Children

AIDS-related lymphoma is a type of cancer called non-Hodgkin lymphoma. It grows in some people with AIDS. AIDS is a disease that weakens the immune system. AIDS raises the risk for long-term (chronic) disease, such as cancer.

Airway Obstruction Index

Infants and children under age 4 are particularly at risk for choking on food or small objects because their upper airways are smaller, and they tend to explore things with their mouths.

Airway Obstruction: Prevention

Because most accidental child strangulations, chokings, and suffocations happen in the home, it's important to carefully childproof your residence.

Airway Obstruction—Identifying High-Risk Situations

Choking hazards in the home: round, firm foods, such as grapes and popcorn, and small nonfood items, such as coins, balloons, and marbles.

Allergic Rhinitis in Children

Allergic rhinitis can happen on a seasonal basis or year-round. There is often a family history of allergic rhinitis, eczema, asthma, or food allergy. Read on to learn details about treating and managing this condition.

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 sometimes the defenses violently attack mostly mild things, such as dust, mold, or pollen.

Allergy

Detailed information on allergy, including symptoms, diagnosis, and treatment

Alpha Thalassemia in Children

Alpha thalassemia is an inherited blood disorder. This means it is passed down through the parent’s genes. It causes anemia in affected children. Learn more about symptoms, diagnosis, and treatment.

Alpha-fetoprotein (AFP) Screening Test

Alpha-fetoprotein screening is a blood test that measures the level of AFP in the mother's blood. Abnormal levels may indicate certain problems with the fetus.

Amenorrhea in Teens

Amenorrhea is when a girl's menstrual bleeding (period) doesn't occur.

Anaphylaxis in Children

Anaphylaxis is a severe and sometimes life-threatening reaction to an allergen. An allergen is something that your child is allergic to. Anaphylaxis is a medical emergency. Your child can have a reaction within seconds or as long as an hour after contact.