Indian Dermatology Online Journal

: 2015  |  Volume : 6  |  Issue : 4  |  Page : 310--311

Plica neuropathica

Lalit Kumar Gupta, Manisha Balai, Ashok Kumar Khare, Asit Mittal 
 Department of Dermatology, Venereology and Leprology, R.N.T. Medical College, Udaipur, Rajasthan, India

Correspondence Address:
Lalit Kumar Gupta
Department of Dermatolgy, Venereology and Leprology, R.N.T. Medical College, Udaipur - 313 001, Rajasthan

How to cite this article:
Gupta LK, Balai M, Khare AK, Mittal A. Plica neuropathica .Indian Dermatol Online J 2015;6:310-311

How to cite this URL:
Gupta LK, Balai M, Khare AK, Mittal A. Plica neuropathica . Indian Dermatol Online J [serial online] 2015 [cited 2020 Oct 20 ];6:310-311
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Full Text

A 30-year-old female presented with two days history of localized irreversibly matted scalp hair predominantly affecting vertex and occiput, mimicking a "bird's nest" [Figure 1] and [Figure 2]. The scalp was otherwise healthy and hair was normal on macroscopic as well as microscopic examination. There was no history of fever, change of soap, shampoo, or oil for hair care. Normal hair, when rubbed together did not show matting. She suffered from a similar episode six months ago for which hair on her entire scalp had to be shaved off. Examination of the scalp showed no evidence of infection or infestation. She had been taking escitalopram and clonazepam for last one year for anxiety - depression disorder. No history of similar affection in family was reported.{Figure 1}{Figure 2}

Plica neuropathica, also called plica polonica, felting or bird's nest hair, was first described by Le Page in 1884. [1] He described a 17-year-old girl with a sudden onset of tangled scalp hair and attributed this strange occurrence to "nerve force," while the parents of the child considered it a "visitation from God." [2] The condition, though sparsely reported in literature, is seemingly quite common among Hindu ascetics (sadhus) in India, where hair is not trimmed and proper hair care is not observed. [3]

It presents as a compact mass of scalp hair with irregular twists and irreversibly entangled plaits that form a firm to hard impenetrable mass of keratin cemented together with dirt and exudates. [2] The exact etiopathogenesis of plica neuropathica is not known. However, it has been attributed to longitudinal splitting or weathering of hair shaft due to vigorous friction and frequent use of harsh shampoos and harsh cleansers; and/or due to keeping of long hair with poor hair care or its neglect. Some other predisposing factors suggested are kinky hair and febrile illness. [4] This entity has been also found to be more frequent among psychologically disturbed women due to the repeated manipulation of the hair. [5]

The treatment of plica neuropathica involves cutting the matted hair. In the early cases, manual separation using organic solvents can be tried. Prevention includes hair care measures such as regular cleaning of the hair with mild cleansers or shampoos, gentle oiling and combing to avoid entangling, and regular hair trimming. Piling hair over the vertex while washing, and backcombing should be avoided. [4]


1Ghodake NB, Singh N, Thappa DM. Plica neuropathica (polonica): Clinical and dermoscopic features. Indian J Dermatol Venereol Leprol 2013;79:269.
2Kumar PN, Antony B, Chakravarthy A, Koyamu AM. Plica neuropathica (polonica) in schizophrenia - A case report and review of literature. Indian J Psychiatry 2001;43:281-3.
3Kanwar AJ, De D. Plica neuropathica in a 2-year-old boy. Int J Dermatol 2007;46:410-1.
4Marshall J, Parker C. Felted hair untangled. J Am Acad Dermatol 1989;20:688-90.
5Khare AK. Plica neuropathica. Indian J Dermatol Venereol Leprol 1985;51:178-9.