Pits in the proximal nail plate are still covered by parakeratotic scales.
It has been shown that regular pitting may convert to rippling or ridging, and these two conditions appear, at times, to be variants of uniform pitting (Figures 3.26-3.28). Nails showing diffuse pitting grow faster than the apparently normal nails in psoriasis. Occasional pits occur on normal nails. Deep pits can be attributed to psoriasis, and profuse pitting is most often due to this condition (Figures 3.29, 3.30). In alopecia areata (Figure 3.31) shallow pits are usually seen and they are often numerous, leading to trachyonychia (rough nail) and twenty-nail dystrophy; however, curiously, one nail often remains unaffected for a long time, Pits may also occur in eczema or occupational trauma. In some cases a genetic basis is thought likely. In secondary syphilis and pityriasis rosea pitting occurs rarely. One case of the latter has been observed with the pits distributed on all the finger nails at corresponding levels, analogous to Beau's lines.
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Do You Suffer From the Itching and Scaling of Psoriasis? Or the Chronic Agony of Psoriatic Arthritis? If so you are not ALONE! A whopping three percent of the world’s populations suffer from either condition! An incredible 56 million working hours are lost every year by psoriasis sufferers according to the National Psoriasis Foundation.