The baby spit out the tofu dregs of milk to consider is physiological factors, and the baby’s digestive tract is not yet well developed related; may also be caused by pathological factors, such as indigestion. 1. physiological factors: due to the baby’s gastrointestinal tract is not well developed, the stomach is relatively straight, the emptying speed is relatively slow, when the milk after eating milk and gastric juices mixed, the formation of tofu dregs, when the baby spit up symptoms are prone to the above-mentioned situation. 2. indigestion: due to the baby’s digestive function is relatively weak, when the cold or irregular supplemental food, it is easy to induce indigestion disease, showing the above symptoms. There may be other reasons for your baby’s spitting up, so it is recommended that you go to the hospital in time to have a complete examination to determine the cause of the problem, and then give targeted treatment under the guidance of the doctor.