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Pruritus can be defined as “an unpleasant sensation that causes the desire to scratch” . Pruritus sine materia is a pruritus that is not associated with causal dermatosis and it may be acute or chronic [4, 6]. The condition may occur in several circumstances, i.e. atopic tendency cholestasis or kidney failure, general disorders (blood diseases, endocrine diseases, etc.). Pruritus sine materia may also be induced by exogenous agents (chemical or medicinal products) or it may be neurogenic or psychogenic.
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