Sleep rolling of the eyes and grinning in infants is usually normal. When infants are in certain pathological states, they can also cause the symptom of rolling eyes, but this is relatively rare. 1. Normal condition: infants experience more light sleep than adults because their nervous system is not yet mature enough. When infants are in a light sleep state, they can cause obvious brain electrical activity, which may result in rolling eyes, grinning, crying and so on. This is a normal physiological phenomenon. 2. Pathological conditions: infants with hypoxia may cause cerebral neurological damage, which can lead to frequent and regular rolling of the eyes in a short period of time, double gaze, limb straightening and other symptoms. Infants sleeping for a short period of time frequently appear rolling eyes, grinning and so on, it is recommended to go to the hospital in time for examination, clear causes, and then actively carry out treatment.