exclamation point hair

ex·cla·ma·tion point hair

the type of dystrophic anagen hair found at margins of patches of alopecia areata; the bulb is absent.
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The affected skin appears normal with no grossly evident epidermal alterations such as scaling or follicular abnormalities.21 In all forms "exclamation point hairs" are found, that become narrower along the length of the strand closer to the base may be seen within or around the areas of alopecia.22 Upon regrowth, hair often initially lack pigment resulting in blonde or white hair.23 Nail changes can be seen in a portion of patients (10-66%) of AA.