Two-month-old babies cry in the evening may infantile colic, infantile colic is a type of acute abdominal pain in children, mostly occurring in babies less than three months old. The child often at the same time, usually in the dusk or evening appeared unexplained sudden loud crying, can be paroxysmal episodes, can also continue for several hours, no matter coaxing and breastfeeding can not be relieved. The crying does not stop until the baby is exhausted or after defecation or gas, and the crying is accompanied by redness of the face, shortness of breath, abdominal distension, clenched hands, legs curled up towards the abdomen, and coldness at the ends of the limbs; it may also be caused by vitamin D deficiency, which leads to calcium malabsorption.