Diseases & conditions A-Z List
Diseases & Conditions A-Z List - «H»:
Human placental lactogen
Human placental lactogen (hPL) is a hormone produced by the placenta, the organ that develops during pregnancy to help feed the growing baby. This hormone breaks down fats from the mother to provide fuel for the the growing baby. It can lead to insulin resistance and carbohydrate intolerance in the ...
Humidifiers and health
Increasing the humidity in your home helps eliminate the dry air that can irritate and inflame the passages in the nose and throat. Humidified air can relieve the discomfort of colds and the flu and can be particularly helpful for people who have asthma. Humidified air can also help keep skin moist ...
Hump behind the shoulders
Hump behind the shoulders is a lump of fat on the back of the neck.
A hump behind the shoulders by itself is not a sign of any one, specific condition. The doctor must consider this along with other symptoms and test results.
Certain drugs used to treat AIDS
Extended use of c...
Hunter syndrome is an inherited disease in which long chains of sugar molecules (mucopolysaccharides) are not broken down correctly and build up in the body.
Hunter syndrome is an inherited condition. Boys are most often affected.
The condition is caused by a lack of the enzyme iduronate sul...
Huntington's disease is a disorder passed down through families in which certain nerve cells in the brain waste away, or degenerate.
American doctor George Huntington first described the disorder in 1872.
Huntington's disease is caused by a genetic defect on chromosome #4. The defect causes ...
Hurler syndrome is a rare, inherited disease of metabolism in which a person cannot break down long chains of sugar molecules called glycosaminoglycans (formerly called mucopolysaccharides).
Hurler syndrome belongs to a group of diseases called mucopolysaccharidoses, or MPS.
MPS II (Hunt...
A hydatidiform mole is a rare mass or growth that forms inside the uterus at the beginning of a pregnancy. It is a type of gestational trophoblastic disease (GTD).
Gestational trophoblastic disease
Choriocarcinoma (a cancerous form of GTD)
A hydatidiform mole, or molar pregnan...
Hydrocarbon pneumonia is caused by drinking or breathing in gasoline, kerosene, furniture polish, paint thinner, or other oily materials or solvents. These products cause fairly rapid changes in the lungs, including inflammation, swelling, and bleeding.
This is for information only and not for use i...
A hydrocele is a fluid-filled sack along the spermatic cord within the scrotum.
Hydroceles are common in newborn infants.
During normal development, the testicles descend down a tube from the abdomen into the scrotum. Hydroceles result when this tube fails to close. Fluid drains from the abd...
Hydrocephalus is a build up of fluid inside the skull, leading to brain swelling. Hydrocephalus means "water on the brain."
Hydrocephalus is due to a problem with the flow of cerebrospinal fluid (CSF), the liquid that surrounds the brain and spinal cord. The fluid brings nutrients to the bra...
Hydrocodone and acetaminophen overdose
Hydrocodone and acetaminophen overdose occurs when someone accidentally or intentionally takes more than the normal or recommended amount of a painkiller containing both the opioid medication, hydrocodone, and acetaminophen (Tylenol).
This is for information only and not for use in the treatment or ...
Hydrocodone and oxycodone are drugs that are mostly used to treat extreme pain.
Hydrocodone/oxycodone overdose occurs when someone intentionally or accidentally take too much medicine containing these ingredients. A person may accidentally take too much of the medicine because they are not getting p...
Hydromorphone is a prescription medicine used to relieve severe pain. Hydromorphone overdose occurs when someone accidentally or intentionally takes more than the normal or recommended amount of this medication.
This is for information only and not for use in the treatment or management of an actual...
Hydrops fetalis is a serious condition in which abnormal amounts of fluid build up in two or more body areas of a fetus or newborn.
See also: Erythroblastosis fetalis
There are two types of hydrops fetalis: Immune and nonimmune. The exact cause depends on which form a baby has.
Hydroxyzine is an antihistamine used to treat symptoms of allergies and motion sickness.
Hydroxyzine overdose occurs when someone accidentally or intentionally takes more than the normal or recommended amount of this medication.
This is for information only and not for use in the treatment or manage...