Conditions We Treat

Browse Conditions A-Z

Hepatoblastoma

Hepatoblastoma is a very rare cancer. It’s a tumor that starts in the liver. The cancer cells are similar to fetal liver cells. It usually affects children less than 3 to 4 years of age.

Learn More
Hepatocellular Carcinoma

Learn More
Hereditary Non-polyposis Colorectal Cancer (HNPCC)

Hereditary nonpolyposis colorectal cancer, often called HNPCC or Lynch Syndrome, is an inherited cancer syndrome that affects the digestive tract, reproductive tract and other major organs. People with Lynch Syndrome have an increased risk of cancers of the stomach, small intestine and liver.

Learn More
Hereditary Retinoblastoma

Learn More
Herpangina in Children

Herpangina is a very common illness in children. It causes small blister-like bumps or sores (ulcers) in the mouth.

Learn More
Herpes Simplex Virus

Herpes simplex virus (HSV) is a very contagious virus that causes infections. There are two types of HSV. One type (HSV-1) usually causes sores around the lips or inside the mouth that are sometimes called fever blisters or cold sores. The other type (HSV-2) usually causes sores on the genitals.

Learn More
Herpes Simplex Virus (Cold Sores) in Children

Cold sores are small blisters around the mouth caused by the herpes simplex virus. Once a child is infected with the virus, the virus becomes inactive (dormant) for long periods of time. It can then become active at any time and cause cold sores.

Learn More
Hidradenitis Supperativa (HS)

Hidradenitis suppurativa (HS) is a long-term (chronic) skin condition. Plugged pores and red, tender bumps or boils begin deep in the skin around hair follicles that contain specific sweat glands called apocrine glands. The tender bumps often enlarge, break open and drain pus.

Learn More
High Blood Pressure

High blood pressure, also known as hypertension, means that there is higher than normal pressure inside the arteries either during systole (when the heart contracts and pumps blood through the body), or during diastole (when the heart relaxes and fills with blood).

Learn More
High Blood Pressure in Children and Teens

Blood pressure is the force of the blood pushing against the artery walls. High blood pressure (hypertension) means that the pressure inside the arteries is too high. This higher pressure may harm the arteries and cause the heart to work harder.

Learn More
High Cholesterol

Cholesterol is a fatty yellow substance made by your liver from the fats, carbohydrates and proteins in the food you eat. There are two important types of cholesterol. One is LDL or "bad" cholesterol. The other is HDL or the "good" cholesterol.

Learn More
High-Risk Newborn Blood Disorders

Detailed information on blood disorders that place a newborn at higher risk and require clinical care by a physician or other healthcare professional

Learn More
Helping Hands Patient Education Materials

Written and illustrated by medical, nursing and allied health professionals at Nationwide Children's Hospital, Helping Hand instructions are intended as a supplement to verbal instructions provided by a medical professional. The information is periodically reviewed and revised to reflect our current practice. However, Nationwide Children's Hospital is not responsible for any consequences resulting from the use or misuse of the information in the Helping Hands.