Alopecia is an involuntary loss of hair usually in the scalp that may occur anywhere over the body.
Scarring alopecia is severe inflammation of the hair follicle result in irreversible damage.
Non-scarring alopecias are reversible.
Alopecia may  be abrupt or gradual in onset.
Most common causes include androgenic alopecia (male & female pattern baldness) & alopecia areata.
History should be reviewed for medications, severe diet restriction, vitamin A supplementation, thyroid symptoms, concomitant illness & stress factor.

  1. Hull S, Wood M, Hutchingson P. Guidelines for the management of alopecia areata. Br J Dermatol. 2003;149:692-699. PMID: 14616359
  2. Rakel: Conn’s current therapy. 2006;58:950-952
  3. Madani S, Shapiro J. Alopecia areata update. J Am Acad Dermatol. 2000 Apr;42(4):549-566. PMID: 10727299
  4. Jackson EA. Hair disorders. Prim Care. 2000;27(2):319-332. PMID: 10815046
  5. Olsen E, Messenger A, Shapiro J, et al. Evaluation and treatment of male and female pattern hair loss. J Am Acad Dermatol. 2005 Feb;52(2):301-311. PMID: 15692478
  6. Price VH. Treatment of hair loss. New Eng J Med. 1999 Sep;341(13):964-973. PMID: 10498493
  7. Sawaya ME, Shapiro J. Androgenic alopecia. New approved & unapproved treatments. Dermatol Clin. 2000 Jan;18(1):47-61. PMID: 10626111
  8. Ross E, Shapiro J. Management of hair loss. Dermatol Clin. 2005;23(2):227-243. PMID: 15837153
  9. Scow TD, Nolte RS, Shaugnessy AF. Medical treatments for balding in men. Am Fam Physician. 1999 Apr;59(8):2189-2199. PMID: 10221304
  10. Sinclair R. Male pattern androgenic alopecia. BMJ. 1998 Sep;317(7162):865-869. PMID: 9748188
  11. Shapiro J, Wiseman M, Lul H. Practical management of hair loss. Can Fam Physician. 2000 Jul;46:1469-1477. PMID: 10925761
  12. Shapiro J, Price VH. Hair regrowth: therapeutic agents. Dermatol Clin. 1998 Apr;16(2):341-356. PMID: 9589208
  13. Thiedke CC. Alopecia in women. Am Fam Physician. 2003;67(5):1007-1014
  14. Habif TP. Hair diseases. Clinical dermatology: a color guide to diagnosis and therapy. 5th ed. Pennsylvania: Mosby, Elsevier; 2010
  15. MedWorm
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