Head lice
Kwell) contains gamma benzene, which can be toxic to the brain and has been linked to childhood leukemia. For this reason, these medications are no longer generally recommended for treatment for head lice.
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- Head, optic nerve
The circular area in the back of the inside of the eye where the optic nerve connects to the retina.
- 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, like chest pain or back ache, has many causes. All headaches are considered primary headaches or secondary headaches. Primary headaches are not associated with other diseases. Examples […]
- Headache, cluster
A distinctive episodic syndrome of headaches. The most common cluster headache pattern, acute cluster headache, is characterized by one to three short attacks of pain each day around the eyes, clustered over a stretch of 1 to 2 months, and followed by a pain-free period that averages 1 year. The other main pattern of cluster […]
- 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, 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.