正常幼儿平均每天大便一次或两天一次。粪便在结肠内停留时间长,便使水分继续被吸收,使粪便干结,会成为便秘。幼儿便秘大多是功能性的,原因很多。一是为饮食不足,腹肌和肠肌力量弱,推动力弱,致顽固便秘;二是为饮食结构不合理,吃主食和蔬菜太少,体内缺乏促进肠蠕 Normal children average bowel movements once or twice daily. Stool in the colon to stay a long time, it will continue to be absorbed water, so stool dry, will become constipation. Most children’s constipation is functional, for many reasons. First, for lack of diet, weak abdominal muscles and intestinal muscles, impetus weak, causing stubborn constipation; the second is unreasonable diet, eating staple foods and vegetables too little, the lack of promotion of intestinal peristalsis