|Classification and external resources|
An Afghan child displaying hair loss due to severe malnutrition.
|ICD-10||L65.0 (ILDS L65.000)|
Telogen effluvium is a scalp disorder characterized by the thinning or shedding of hair resulting from the early entry of hair in the telogen phase (the resting phase of the hair follicle).
Emotional or physiological stress may result in an alteration of the normal hair cycle and cause the disorder.
Telogen effluvium may be caused by eating disorders, fever, childbirth, chronic illness, major surgery, anemia, severe emotional disorders, crash diets, hypothyroidism, and drugs.
Diagnostic tests, which may be performed to verify the diagnosis, include a trichogram, trichoscopy and biopsy.
Vitamin D levels may also play a role in normal hair cycle. 
- ^ a b Marks, James G; Miller, Jeffery (2006). Lookingbill and Marks' Principles of Dermatology (4th ed.). Elsevier Inc. Page 263. ISBN 1-4160-3185-5.
- ^ James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology. (10th ed.). Saunders. ISBN 0-7216-2921-0.
- ^ a b Freedberg, et al. (2003). Fitzpatrick's Dermatology in General Medicine. (6th ed.). McGraw-Hill. ISBN 0-07-138076-0.
- ^ Rudnicka L, Olszewska M, Rakowska A, Kowalska-Oledzka E, Slowinska M. (2008). "Trichoscopy: a new method for diagnosing hair loss". J Drugs Dermatol 7 (7): 651–654. PMID 18664157.
- ^ Does D matter? The role of vitamin D in hair disorders and hair follicle cycling. Dermatol Online J. 2010 Feb; 16(2). PMID 20178699
Diseases of the skin and appendages by morphology