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kidshealth library

health & safety topics

Your child's health and safety is our top priority. Please search our resource library for information on health, nutrition, fitness, injury prevention and other important topics.

Genetic, Chromosomal & Metabolic Conditions

Goiters and Thyroid Nodules

An enlarged thyroid gland is a lump that can be felt under the skin at the front of the neck. When it's big enough to see easily, it's called a goiter. A thyroid nodule is a lump or enlarged area in the thyroid gland.

Hemophilia

Hemophilia is a rare bleeding disorder that prevents the blood from clotting properly. With modern treatment, most kids who have it can lead full, healthy lives.

Hemophilia: Handling Bleeds

Kids with hemophilia can bleed easily or longer than normal. So it's important for parents to know how to handle bleeding when it happens.

Hereditary Hemochromatosis

This genetic disease causes the body to store too much iron. Learn more about hemochromatosis.

Hydroxyurea for People With Sickle Cell Disease

Hydroxyurea is a medicine that can help kids and teens who have sickle cell disease. Find out how it works.

Hyperthyroidism and Graves’ Disease

Hyperthyroidism happens when the thyroid gland sends too much thyroid hormone into the blood. The most common cause of hyperthyroidism is Graves' disease.

Hypochondroplasia

Hypochondroplasia is a condition that affects the growth of bone and cartilage. Kids who have it are shorter than other kids of the same age).

Hypothyroidism and Hashimoto’s Thyroiditis

An underactive thyroid makes too little thyroid hormone, causing hypothyroidism. Hashimoto's thyroiditis, which causes most cases of hypothyroidism in kids and teens, is a condition in which the immune system attacks the thyroid.

If Your Baby Has a Birth Defect

If your child has a birth defect, you don't have to go it alone - many people and resources are available to help you.

Klinefelter Syndrome

Boys with this condition have an extra "X" chromosome that prevents them from developing normally during puberty. But hormone treatments, counseling, and other therapies can help.