摘要: The literature on chronic pruritus, paresthesia and delusional infestation indicates that a wide variety of conditions ranging from AIDS to vitamin deficiencies may cause these symptoms. In many, or perhaps most cases, activation itch pathways seems be the underlying skin sensations even visual hallucinations characteristic infestation. principle difference between diagnoses pruritus appears lie in patient's interpretation symptoms, rather than physiological differences. Delusional infestation, must considered symptoms conditions.