By Gary M. White, MD

Felting is the sudden, unmanageable tangling of the scalp hair. It is also known as plica polonica (gross neglect) and plica neuropathica (psychiatric disorders).


Portions of the scalp hair are matted, intertwined, and cannot be separated or combed.


The hair usually has to be cut. One patient untangled the hair over 2 1/2 months with a knitting needle and olive oil [JAAD 1989;20;688].


Indian Dermatol Online J 2015;6:310-1

Int J Trichology. 2014 Apr-Jun; 6(2): 69–70


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