Twenty-day-old babies pulling milk petals is usually an abnormal phenomenon, which may be caused by indigestion, formula feeding and other factors. 1. Indigestion: Since the digestive function of a twenty-day-old baby is not yet perfect, if the baby drinks too much milk, resulting in indigestion, the phenomenon of pulling milk flaps will occur. 2. formula feeding: if the mother’s breast milk is insufficient, or other reasons lead to the inability to breastfeeding, but through the formula feeding, due to the formula will have artificial added nutrients, the baby may have an intolerance of the situation, there will also be the phenomenon of pulling milk petals. Twenty-day-old baby pulling milk petals may also be caused by other reasons, such as gastrointestinal infections, etc. It is recommended to take the baby to the hospital, identify the cause of the symptomatic treatment.