The child in the month does not cry or sleep may be a normal phenomenon, environmental reasons, calcium deficiency and so on. 1. Normal phenomenon: if the child in the month of milk is more adequate, the environment is also more appropriate, may be a normal phenomenon, the child if more comfortable and sleep has been more adequate, there will be no crying and not sleep performance, may be the child is playing. 2. Environmental reasons: the environment may also affect the child’s sleep, brighter lights or indoor people in and out frequently, louder, etc., these will affect the child’s normal sleep, so that the child can not sleep normally. 3. Calcium deficiency: Calcium deficiency in newborns can lead to increased brain and nerve excitability, and symptoms such as not falling asleep easily or not sleeping soundly and waking up easily. There may be other reasons why the child does not cry in the month, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.