The baby’s backwardness is divided into two cases: 1, physiological, the baby may have once a day, or once a few days, the baby is just uncomfortable, a bit of jerking, this is also a kind of movement, do not care. 2, manifested as increased muscle tone, so the child loves to jerk, often children with backward motor development is more common, the frequency of jerking is more, this child should be combined with other clinical performance, such as For example, if a two-month-old child can lift his head prone, if a three-month-old child can lift higher, and if a five-month-old child can roll over, we should analyze the situation of jerking in combination with these motor development. In addition, you can also go to the hospital every month for a developmental assessment, through which the doctor can understand the child’s muscle tone and motor development, and if there is a motor development delay, it needs to be treated as soon as possible.