By Gary M. White, MD


Trichomycosis. This most commonly occurs in the groin or axilla.

Hair Casts

Pediculosis. Shown here in the pubic area.
Pediculosis in the Pubic Area


Circle Hair

Rolled Hair
Rolled Hair


Hair Follicle Nevus

Curly Hair

Acitretin Use

Acquired Progressive Kinking Of Hair

Woolly Hair Nevus

Fragile Hair

Bubble Hair

Cartilage-Hair Hypoplasia

Ectodermal Dysplasias: Alopecia of the eyebrows along with more generalized hypotrichosis, fragile hair, and other findings may occur in both hidrotic and hypohidrotic ectodermal dysplasia.

Hypotrichosis, Hair Structure Defects, Hypercysteine Hair And Glucosuria [BJD 1996;134;319].

Menkes Disease


Netherton Syndrome

Pili Annulati

Pili Torti

Congenital hypotrichosis and Stargardt macular dystrophy characterized by hair loss, macular degeneration, and progressive loss of vision.
(An Bras Dermatol 88:jan/feb 2013)

Trichorrhexis Nodosa

Trichorhinophalangeal Syndrome Type I



See Green Hair

Heterochromia, Congenital

Scalp Hair Heterochromia in a 5-year-old child thought to represent somatic mosaicism [Peds Derm 2014;31;733]. The lighter hair was blond and not white as in poliosis.


Chédiak-Higashi Syndrome

Griscelli Syndrome

Single Hair

Acquired Hypertrichosis Singularis

Tufts Of Hair

Median Nasal Dermoid Fistula
Median Nasal Dermoid Fistula

Tufted Folliculitis
Tufted Folliculitis


Trichostasis Spinulosa
Trichostasis Spinulosa


Yellowing of the hair is called xanthotrichosis. It may occur from a wide variety of factors including cigarette smoke, copper, picric acid, resorcinol (dihydroxybenzene), and topical medications e.g., anthralin, minoxidil, selenium sulfide and tar shampoo [Dermatology Online Journal 22;6].

White Forelock

White Forelock

White Nodes

Trichorrhexis Nodosa



Leukotrichia means white hair. The acute change of dark hairs to light in a localized area may occur in vitiligo, alopecia areata and during the regression of nevi e.g., halo nevi [Indian J Dermatol 2016;61:238].

Canities (Diffuse Whitening Of Hair)

Diffuse graying of the hair is called canities and usually occurs as a natural process of aging. Rapid whitening of the hair (e.g., overnight) is probably due to selective loss of only the pigmented hair in alopecia areata. Gradual premature graying may occur in progeria, Werner syndrome, dystrophia myotonica, Book syndrome (palmoplantar hyperhidrosis, premolar hypodontia), after beginning chloroquine, and cri-du-chat syndrome. The drug pazopanib turned one man's black hair nearly completely white over 5 months. [Ann Dermatol. 2015 Dec; 27(6): 791–792]

Premature Graying of Hair

Graying of hair may occur in unusual distributions, e.g., unilaterally. [Int J Trichol 2015;7:85-6]

Alternating White and Dark

Flag Sign



Repigmentation of prematurely gray/white hair has been reported with various medications including latanoprost, lenalidomide, para-aminobenzoic acid, acitretin, etretinate, corticosteroids, cyclosporine, L-thyroxine, verapamil, tamoxifen, levodopa, cisplatin, erlotinib, adalimumab, and imatinib [Dermatology Online Journal 21;6].


Both lentigo maligna and melanoma may cause localized darkening of hair [JAMA Derm 2016;152;81].

Uncombable Hair

Felting. For a picture, see Indian Dermatol Online J 2015;6:310-1

Uncombable Hair Syndrome

Hypertrichosis Facial Vellus Hair

Hypertrichosis Lanuginosa
Hypertrichosis Lanuginosa

Porphyria Cutanea Tarda

Anorexia Nervosa


Home | FAQs | Use of Images | Privacy Policy | Contact

It is not the intention of to provide specific medical advice, diagnosis or treatment. only intends to provide users with information regarding various medical conditions for educational purposes and will not provide specific medical advice. Information on is not intended as a substitute for seeking medical treatment and you should always seek the advice of a qualified healthcare provider for diagnosis and for answers to your individual questions. Information contained on should never cause you to disregard professional medical advice or delay seeking treatment. If you live in the United States and believe you are having a medical emergency call 911 immediately.