53 patients are selected and they are asymptomatic in their aspects. 23 patients have nylon scrub used for bath and 10 patients wearing the nylon clothing and remaining are not used the nylon brush but they have hyper pigments on the face, back and fore arm. Nylon brush user have bluish black pigments on the bone and below the bony prominence and other 10 regular users of nylon or synthetic clothing have blackish discoloration on abdomen , back and shoulders.
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