trichorrhexis nodosa

trichorrhexis nodosa
a condition in which the hairs break easily. It may be due to a hereditary condition or it may occur as a consequence of repeated physical or chemical injury. The latter condition may follow the use of heat or bleach on the hair or be caused by persistent rubbing.

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a hair condition in which the shafts appear to have nodes but actually have splitting of the cortex into strands; it usually affects the proximal part of the shaft, so that hairs grow a few centimeters and break off. It may be either congenital or acquired; the acquired form is usually in persons with curly hair who repeatedly straighten their hair.

Medical dictionary. 2011.

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