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嗜异症或称异食癖,是指婴幼儿在摄食过程中逐渐出现的一种特殊嗜好,对通常不应取食的异物(如煤渣、土块、墙泥、砂石、肥皂、纸张、火柴、钮扣、毛发、毛线以及金属玩具或床栏上的油漆等),进行难以控制的咀嚼与吞食。发病年龄以幼儿为多,但学龄儿童亦可见到。关于发病的原因,一般认为是一种心理失常的强迫行为,往往与家庭环境的异常状态有关(如失去母
Hemophilia, or pica, refers to the special hobby that infants and young children emerge gradually during ingestion of foreign substances such as cinders, clods, wall slime, gravel, soap, paper, Matches, buttons, hair, wool, paint on metal toys or bed rails, etc.) for difficult to control mastication and swallowing. Age of onset to more children, but school-age children can also be seen. About the cause of the disease, it is generally considered a compulsive behavior of psychological disorders, often related to abnormal home environment (such as loss of mother