Infant constipation does not cause colic. The so-called constipation refers to the condition where babies aged 1 to 3 months do not defecate for several days or even more than ten days. However, these babies do not exhibit vomiting, abdominal distension, abdominal pain, or diarrhea. Once they do defecate, the stool is not dry and appears normal in shape. Constipation occurs because the baby's gastrointestinal tract is gradually developing, and their ability to digest and absorb is progressively increasing. Consequently, there is less food residue formed, which does not stimulate the bowel movement reaction. It is a normal physiological phenomenon and does not cause colic.