Medical Encyclopedia

 

Medical Encyclopedia

Other encyclopedia topics:  A-Ag  Ah-Ap  Aq-Az  B-Bk  Bl-Bz  C-Cg  Ch-Co  Cp-Cz  D-Di  Dj-Dz  E-Ep  Eq-Ez  F  G  H-Hf  Hg-Hz  I-In  Io-Iz  J  K  L-Ln  Lo-Lz  M-Mf  Mg-Mz  N  O  P-Pl  Pm-Pz  Q  R  S-Sh  Si-Sp  Sq-Sz  T-Tn  To-Tz  U  V  W  X  Y  Z  0-9 

Trichorrhexis nodosa

Contents of this page:

Illustrations

Hair follicle anatomy
Hair follicle anatomy

Definition    Return to top

Trichorrhexis nodosa is a problem in which thickened or weak points (nodes) along the hair shaft cause your hair to break off easily.

Causes    Return to top

Your genes may play a role in whether or not you develop trichorrhexis nodosa.

Certain things you do to your hair -- such as blow-drying, over-brushing, perming, or excessive chemical use -- appear to trigger the condition.

In some cases, trichorrhexis nodosa may be caused be an underlying disorder such as hypothyroidism, argininosuccinicaciduria, Menkes' kinky hair syndrome, Netherton syndrome, or or trichothiodystrophy.

Symptoms    Return to top

Your hair may appear patchy or like it's not growing.

In African-Americans, looking at the scalp area using a microscope shows that the hair breaks off at the scalp area before it grows long.

In Caucasians, the problem often appears at the end of a hair shaft in the form of split ends, thinning hair, and hair tips that look white.

Exams and Tests    Return to top

Examination of the hair shafts with a microscope may reveal changes of trichorrhexis nodosa.

Treatment    Return to top

Improving environmental factors will reduce damage to the hair.

Your doctor may recommend gentle brushing with a soft brush instead of aggressive brushing, ratting, or other procedures.

Avoid harsh chemicals such as those used in straightening compounds and permanents. Do not use a very hot hairdryer for long periods of time. The hair should not be ironed. Avoid excessively harsh shampoos, but always use hair conditioners.

Outlook (Prognosis)    Return to top

Improving grooming techniques and avoiding products that damage hair will help correct the problem.

This condition is not dangerous but may it affect a person's self esteem.

When to Contact a Medical Professional    Return to top

Call your doctor if symptoms do not approve with changes in grooming and other home care measures.

Prevention    Return to top

Avoid aggressive brushing and grooming, strong chemicals, permanents, straightening, and similar hair-damaging habits.

Update Date: 4/16/2007

Updated by: Michael S. Lehrer, M.D., Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network.

A.D.A.M. Logo

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright 1997-2009, A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.