新新有个怪毛病,爱吃墙灰。他常常坐在墙壁前,伸出舌头,贪婪地舔着墙灰。他还爱吃泥土,脏兮兮的泥土,抓起来就往嘴里送,吃得津津有味。妈妈发现后,总是狠狠地批评他,不让他吃,可他还是偷着吃。爸爸气急了打他,甚至捆住他的手脚,但他吃墙皮灰的习惯不但未被制止,反而吃得更凶了。新新得了什么病?新新是典型的异食癖。异食癖是指儿童在摄食过程中逐渐出现的一种特殊嗜好,难以控制地咀嚼与吞食通常不应取食的异物,如煤渣、土块、墙泥、砂石、肥皂、纸张、火柴、纽扣、毛发、毛线以及金属 There is a new strange new disease, eat gray wall. He often sat in front of the wall, sticking out his tongue, greedily licking the wall ash. He also loves to eat dirt, dirty soil, grab it and send it to his mouth, eating relish. When her mother found out, she always criticized him fiercely and did not let him eat, but he still steal to eat. Dad hurried to hit him, and even tied his hands and feet, but his habits of eating gray skin not only failed to stop, but eat even more fierce. What is the new disease? The new new is a typical pica. Pica is a special hobby in which children gradually emerge during ingestion, unmanageably chewing and ingesting foreign objects that should not normally be eaten, such as cinders, clods, plaster, gravel, soap, paper, matches, Buttons, hair, wool and metal