The infant surge period is the three months after birth, during which the infant’s weight and height growth rate is the fastest in the entire infant period. Infancy is the period from birth to one year of age, during which infants grow faster, with the fastest growth rate in the first three months. In general, infants gain twice as much weight in the first three months as they did at birth, and the weight and height gained in the first three months is the sum of the weight and height gained in the last nine months of infancy. Generally, infants in the surge period can show non-stop feeding, waking up more frequently at night, etc. Parents should pay attention to timely feeding, while burping after feeding to avoid choking. In addition, during the period of surge, infants can feel very irritable, sleep regression, parents can soothe them through physical contact, such as holding the baby and patting or singing for them.