Under normal circumstances, a child who spits up physiologically may stop spitting up at 3 to 6 months of age, but the time may vary due to individual differences in the child and the cause of the spitting up. The child spit up may be physiological reasons, may also be pathological reasons. 1. Physiological reasons: children spitting up may be related to the physiological structure of the stomach, children due to developmental reasons, the early stomach for the parallel state, after drinking milk due to change of position, may appear spitting phenomenon. But with age, spitting up will be reduced, some children in 3~4 months will no longer appear spitting up, but some children’s body is more special, it takes a longer time. 2. Disease: If the child suffers from pyloric obstruction, dyspepsia, or if some children are allergic to milk, spitting up may also occur, and may persist even at an older age. There may also be other reasons for children to spit up, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.