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GlossaryLoose Anagen Hair Syndrome (LAHS)

hair is easily and painlessly pulled out during growth phase

Loose Anagen Hair Syndrome (LAHS) is a condition where hair is easily and painlessly pulled out because it is not properly anchored in the hair follicle during the anagen (growth) phase. This typically results in diffuse hair thinning and shedding, primarily affecting children, but it can also occur in adults. The hair often appears thin, fine, and may not grow long.

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research Anagen Effluvium: A Review of Rapid Hair Loss During Growth Phase and Loose Anagen Hair Syndrome

61 citations, January 2013 in “Indian Journal of Dermatology, Venereology and Leprology”

Hair usually grows back 1-3 months after treatment for anagen effluvium, and children with Loose Anagen Hair Syndrome often improve by adolescence.

research Practical Guidelines for Evaluation of Loose Anagen Hair Syndrome

46 citations, October 2009 in “Archives of Dermatology”

Loose anagen hair syndrome, often affecting young girls, can be diagnosed with a hair-pull test and usually gets better on its own, but severe cases may need treatment.

research Abnormal Inner Root Sheath of the Hair Follicle in the Loose Anagen Hair Syndrome: An Ultrastructural Study

31 citations, December 2010 in “Journal of the American Academy of Dermatology”

Loose anagen hair syndrome is caused by structural abnormalities in the hair follicle's inner root sheath.

research Trichoscopy Findings in Loose Anagen Hair Syndrome: Rectangular Granular Structures and Solitary Yellow Dots

18 citations, March 2015 in “Journal of Dermatological Case Reports”

Rectangular black granules, solitary yellow dots, and mostly single-hair follicles suggest Loose Anagen Hair Syndrome.

research Minoxidil 5% Solution for Topical Treatment of Loose Anagen Hair Syndrome

13 citations, March 2014 in “Pediatric Dermatology”

Minoxidil 5% solution significantly improved hair density in a girl with loose anagen hair syndrome over 28 months, with no side effects.

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