A two-year-old child’s stomach aches after drinking formula may be due to indigestion, lactose intolerance and other reasons. If the quality of the milk powder used for breastfeeding is not good, if too much milk is fed at one time, or if the time between meals is too short, it may cause indigestion in the child, resulting in bloating and diarrhea, which may cause the two-week-old child’s stomach to ache after drinking milk powder. If the child due to acquired infections and other reasons damage to the intestinal mucosa or congenital lactase gene deficiency, resulting in small intestinal epithelial lactase activity permanent or temporary decline or even loss, thus causing lactose intolerance, the main symptoms are generally manifested as colic, abdominal distension, nausea, vomiting, intestinal hyperacoustic sound and so on. The two-week-old child after drinking milk powder is always stomach pain, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.