便秘通常是指排便周期长、排出艰难而言，我国早在明代就对便秘的时间界线作过界定：“一日一便（正常），三四日不便为秘（便秘），一日便三四次为利（泄泻）”（李　 《医学入门》）。当然，大便的周期因人而异，生活习惯和饮食结构的不同也会对大便周期产生重大影响。在我国 Constipation usually refers to the long period of defecation, discharge difficult, as early as the Ming Dynasty in China on the definition of the time line of constipation: “a day (normal), three or four days for the secret (constipation), three days a day Four times for the benefit (diarrhea) ”(Lee“ Medical Introduction ”). Of course, the stool cycle varies from person to person, lifestyle and diet will also have a significant impact on the stool cycle. In my country