Trachyonychia is a nail disorder that features a rough texture to the nail surface. It occurs with a variety of inflammatory disorders that affect the nail matrix.


Features of trachyonychia may include:

(1) nail plate roughness ("sandpaper-like")

(2) pitting

(3) ridging


The condition may affect from 1 to 20 nails. If all 20 nails are affected then it may be referred to as 20 nail dystrophy.


Conditions associated with trachyonychia include:

(1) alopecia areata

(2) psoriasis

(3) sarcoidosis

(4) lichen planus

(5) atopic dermatitis

(6) ichthyosis vulgaris

(7) immunoglobulin A deficiency


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