headache, rebound A headache experienced by someone who has taken pain relievers for migraines or other health conditions and has built up a tolerance for these medications. Often a rebound headache occurs right after the medication wears off. Treatment involves using the medication less frequently or switching to a different pain reliever.
headache, muscle tension See headache, tension.
headache, migraine See migraine headache.
headache, febrile A headache associated with fever. Because febrile headache can sometimes indicate serious conditions such as inflammation of the brain (encephalitis), a person who is suffering from a febrile headache should immediately seek medical attention.
headache, cervicogenic A headache that has its origins in the muscles, tendons, and nerves of the neck. It may be a simple tension headache, or it may result from damage to neck joints, ligaments, muscles, tendons, or the trigeminal nerve. Treatment for chronic cervicogenic headaches includes massage, physical therapy, analgesic medication, and in some extreme…
headache A pain in the head, with the pain being above the eyes or the ears, behind the head (occipital), or in the back of the upper neck. Headache has many causes. All headaches are classified as primary or secondary headaches. Primary headaches are not associated with other diseases. Examples of primary headaches are migraine…
head lice Pediculus humanus capitis, parasitic insects found on the human scalp. They lay eggs on the hair shaft close to the root, and hatched lice stay mostly on the scalp. Head lice infection is very common and easily acquired by coming in close contact with someone who has head lice, infested clothing, or infested…
head bones See bones of the head.
HDV Hepatitis D virus. See hepatitis D.
HDL cholesterol High density lipoprotein cholesterol. Lipoproteins, which are combinations of fats (lipids) and proteins, are the form in which lipids are transported in the blood. HDLs transport cholesterol from the tissues of the body to the liver, so the cholesterol can be eliminated in the bile. HDL cholesterol is therefore considered the “good” cholesterol:…
HDL High density lipoprotein. See HDL cholesterol.
HCV Hepatitis C virus. See hepatitis C.