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・ Rhett Miller (album)
・ Rhett Rakhshani
・ Rhett Reese
・ Rhett S. James
・ Rhett the Boston Terrier
・ Rhett Titus
・ Rhett Walker Band
・ Rhett Walton
・ Rhett Warrener
・ Rhetta Hughes
・ Rhetus
・ Rhetus arcius
・ Rhetus periander
・ Rheubarbariboletus
・ Rheubarbariboletus armeniacus
Rheum
・ Rheum (plant)
・ Rheum emodi
・ Rheum lhasaense
・ Rheum maximowiczii
・ Rheum nobile
・ Rheum officinale
・ Rheum palaestinum
・ Rheum palmatum
・ Rheum rhaponticum
・ Rheum ribes
・ Rheum undulatum
・ Rheum webbianum
・ Rheumaptera
・ Rheumaptera cervinalis


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Rheum : ウィキペディア英語版
Rheum

Rheum (; from Greek: ῥεῦμα, ''rheume'', a flowing, rheum), also known as Gound, is thin mucus naturally discharged from the eyes, nose, or mouth during sleep (cf. mucopurulent discharge).〔Amodio, Aimee.("Where Do Eye Boogers Come From?" ), Families.com blog〕〔Hiskey, Daven. ("What the 'Sleep' In Your Eyes Is" ), ''Today I Found Out'', 23 February 2011.〕 Rheum dries and gathers as a crust in the corners of the eyes or the mouth, on the eyelids, or under the nose.〔 It is formed by a combination of mucus (in the case of the eyes, consisting of mucin discharged from the cornea or the conjunctiva), nasal mucus, blood cells, skin cells, or dust. Rheum from the eyes is particularly common. Dried rheum is in common usage called sleep, e.g., to have sleep in one's eyes.
When the individual is awake, blinking of the eyelid causes rheum to be washed away with tears via the nasolacrimal duct. The absence of this action during sleep, however, results in a small amount of dry rheum accumulating in corners of the eye, most notably in children.
A number of conditions can increase the production of rheum in the eye. In the case of allergic conjunctivitis, the buildup of rheum can be considerable, many times preventing the sufferer from opening the eye upon waking without prior cleansing of the eye area. The presence of pus in an instance of heavy rheum buildup can indicate dry eye or conjunctivitis, among other infections.
In infants, the tear ducts (that drain the tears) occasionally fail to open, resulting in the overflow of tears onto the cheeks (epiphora) and rheum deposition on the surrounding skin.
== See also ==

* Mucopurulent discharge

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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