Health Library

HELLP Syndrome

HELLP syndrome is a rare but life-threatening condition in pregnancy. It causes red cells in the blood to break down. It also causes problems with the liver, bleeding, and blood pressure. It's often linked with preeclampsia and eclampsia. It often develops before delivery. But it may also occur after delivery.

Hemifacial Microsomia (HFM) in Children

Hemifacial microsomia (HFM) is a congenital disorder. This means that your child is born with it. In this condition, one side of your baby’s face is underdeveloped (hemi means half). HFM usually only affects one side of the face. Sometimes both sides may be affected.

Hemoglobin C Disease

Most people carry hemoglobin A in their red blood cells. Those who carry hemoglobin C, considered an abnormal variation, may develop hemoglobin C disease. This blood disorder develops because the red blood cells break down earlier than they should, leaving too few in the blood and leading to mild anemia.

Hemoglobin E Trait

Hemoglobin E trait is an inherited blood disorder. That means it's passed down through your parent’s genes. Read on to learn more.

Hemolytic Anemia in Children

Hemolytic anemia is a group of disorders in which the red blood cells are destroyed faster than the bone marrow can make them. Learn more about the causes, symptoms, diagnosis, and treatment.

Hemolytic Disease of the Newborn (HDN)

Hemolytic disease of the newborn (HDN) is a blood problem in newborns. It occurs when your baby's red blood cells break down at a fast rate. Read on to learn more.

Hemolytic Uremic Syndrome (HUS) in Children

Hemolytic uremic syndrome (HUS) is a rare condition in children that can lead to kidney failure. Learn more about this condition, including what causes it, who is at risk, what the symptoms are, and how it's diagnosed and treated.

Hemophilia

Hemophilia is an inherited bleeding disorder. People with hemophilia can’t stop bleeding because they don’t have enough clotting factor in their blood. Clotting factors are needed for blood to clot. Blood clots to prevent excessive bleeding.

Hepatitis B Virus (HBV) in Children

An infant or young child who contracts hepatitis B is at greater risk of staying infected with the virus and of having lifelong liver problems, such as scarring of the liver and liver cancer.

Hepatitis in Children

Hepatitis is an inflammation of the liver. Learn about the causes, symptoms, diagnosis, risk factors, treatment, and more.

Hepatoblastoma in Children

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.

Herpangina in Children

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