Symptoms of shaky feet in babies may be caused by the immaturity of the central nervous system, vitamin D or calcium deficiency. 1. Central nervous system immaturity: some babies may be due to the central nervous system is not fully developed, the cerebral cortex excitability is high, the brain’s ability to control local muscles is relatively weak, the above situation baby encountered hot and cold temperature stimulation, or violent crying, excitement will lead to foot shaking. 2. Vitamin D or calcium deficiency: some babies may be caused by vitamin D deficiency or calcium deficiency, due to the increased excitability of the cerebral cortex, which can cause babies to appear the phenomenon of trembling feet. This symptom alone is not enough to diagnose the disease, there may be other factors. It is recommended that the patient consult a doctor in a timely manner to clarify the cause of the disease and give targeted treatment.