What is Wrinkle?
[[File:Nepali woman, Ghyaru (crop).jpg|thumb|300px|right|An elderly woman showing facial wrinkles]] A '''wrinkle''' is a fold, ridge or crease in the [[skin]], similar to those that can form on the surface of fabric. The medical term is ''rhytide.'' ==Causes== Skin wrinkles are common as a result of [[aging]] ,<ref>{{cite journal|last=Danby|first=FW|title=Nutrition and aging skin: sugar and glycation|journal=CLN Dermatol|date=Jul–Aug 2010|volume=28|series=4|issue=4|pages=409–411|doi=10.1016/j.clindermatol.2010.03.018|pmid=20620757}}</ref> reoccurring sleeping positions,<ref>{{cite web|last=American Academy of Dermatology|title=Causes of Aging|url=http://www.skincarephysicians.com/agingskinnet/basicfacts.html|work=AgingSkinNet|publisher=American Academy of Dermatology|access-date=5 March 2013}}</ref> loss of [[weight]], or as the result of being under [[water]] for long periods of time. Age wrinkling in the skin is affected by constant facial expressions, [[aging]], [[solar radiation|sun damage]], [[smoking]], poor [[hydration]], and various other factors.<ref>Anderson, Laurence. 2006. ''Looking Good, the Australian guide to skin care, cosmetic medicine and cosmetic surgery''. AMPCo. Sydney.</ref> ==References== {{reflist|30em}} [[Category:Skin]] [[Category:Old age]] {{biology-stub}}