乳糖不耐受症是由于小儿体内缺乏乳糖酶,不能分解人乳和牛乳中的乳糖引起的一种病症。可分为原发性和继发性,继发性发生在感染性腹泻之后。乳糖酶不足或缺乏,在我国小儿中并非少数,但其中多数并不表现出症状,只有极少数可有腹泻,每 Lactose intolerance is due to the lack of lactase in children, can not break down human milk and lactose in milk caused a disease. Can be divided into primary and secondary, secondary to infectious diarrhea. Insufficient or lack of lactase is not a small number in our children, but most of them do not show symptoms, only a very small number may have diarrhea, each