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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