Browse our Health Library to learn about treatments, conditions, and how Cedars-Sinai can support your healthcare needs.
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. It’s also called erythroblastosis fetalis.
Hemolytic uremic syndrome (HUS) is a rare condition that can lead to kidney failure. The syndrome harms the small structures and vessels inside the kidneys. HUS causes red blood cells to clog the tiny blood vessels in the kidneys. It may...
Hemophilia is an inherited bleeding disorder. Children 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 ...
Hemorrhagic stroke happens when a blood vessel in the brain breaks or bleeds. This causes brain cells to die. Stroke can take away your ability to do certain things, like speak or walk. Learn the symptoms of hemorrhagic stroke and what ...
Hemorrhoids are when the veins or blood vessels in and around your anus and lower rectum become swollen and irritated. This happens when there is extra pressure on these veins.
Hemorrhoids and varicose veins might seem to be two different, unrelated problems, but they are actually quite similar. And, many women, especially those in the third trimester of pregnancy, have them.
Henoch-Schönlein purpura (HSP) is a condition that involves swelling (inflammation) of small blood vessels. The swollen blood vessels leak into the skin, joints, intestines, and kidneys.
Hepatitis A is a liver disease that is easily spread from person to person (highly contagious). Hepatitis is a redness or swelling (inflammation) of the liver that sometimes causes lasting damage. Hepatitis A is one type of hepatitis.
Hepatitis is an inflammation of the liver. The hepatitis A virus is one of five that cause this disease. This video takes a closer look at hepatitis A—how it is spread and what you can do to prevent its transmission.
Hepatitis B is one of five virus types that cause hepatitis, an inflammation of the liver. Hepatitis B is considered a sexually transmitted disease. This video takes an in-depth look at hepatitis B—how common it is, how it is spread, and...
Hepatitis is a redness and swelling (inflammation) of the liver. It sometimes causes permanent liver damage.
The hepatitis C virus is another type of hepatitis virus that causes an inflammation of the liver. HCV is transmitted though exposure to infected blood or blood products. In this video, you'll find out more about how it's transmitted, ...
Hepatitis C is a liver disease that is caused by the hepatitis C virus. It is a redness and swelling (inflammation) of the liver that sometimes causes lasting damage. The liver isn’t able to work the way it should.
Hepatitis is an inflammation of the liver. It can damage and destroy liver cells.
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.
Hereditary hemochromatosis is one of the most common genetic disorders in the U.S. Itcauses your body to absorb too much iron from the food you eat.
Herpangina is a very common illness in children. It causes small blister-like bumps or sores (ulcers) in the mouth.
Herpes eye disease is a group of eye disorders caused by infection with the herpes simplex virus (HSV).
Herpes meningoencephalitis is an infection of the brain and the tissue that covers it with the herpes simplex virus.
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 ...
Detailed information on mouth infections, including the oral herpes simplex virus infection
In a hiatal hernia, part of your stomach pushes up into an opening (the hiatus) in your diaphragm. The diaphragm is the muscle between your stomach and your chest.
Hidradenitis suppurativa, or acne inversa, is a condition that causes deep, painful boils or abscesses in your skin.
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...
High blood pressure, or hypertension, increases the risk for coronary heart disease (heart attack) and stroke (brain attack).
A hip fracture is a break in the thigh bone (femur) of your hip joint. The majority happen to people older than 60 years of age, and women get more hip fractures than men.
According to the American Association of Orthopaedic Surgeons, more than 200,000 hip replacements are performed each year. Of these, osteoarthritis accounts for the majority of patients needing a hip replacement operation. The physicians...
Artificial hip joints have become quite common in recent years. Over time, however, some hip implants may loosen or otherwise need to be repaired. This video takes a look at hip revision surgery.
Hirschsprung disease is a rare birth defect. It affects the nerve cells in the large intestine. These nerve cells control the muscles that move food and waste, or stool, through the large intestine. The large intestine is the last part ...
Detailed information on excessive hairiness, including causes, diagnosis, and treatment