2-year-old children often constipation is divided into organic and functional two kinds, organic have congenital megacolon, anorectal development abnormality, endocrine diseases, etc.; Functional and diet-related. 1. Organic constipation: children often appear constipation may organic constipation related, such as suffering from congenital megacolon, anorectal development abnormalities, or congenital hypothyroidism and other endocrine diseases and other factors. 2. Functional constipation: functional constipation most and eat less, drink less water and other factors related to these can lead to slow bowel movement, difficult to defecate and so on. 2-year-old children often constipation may also have other reasons, it is recommended to timely to the hospital for relevant examination, clear cause after active symptomatic treatment.