The causes of shivering and trembling in newborns include physiological factors, such as holding in urine and being stimulated by external factors, as well as pathological factors, such as calcium deficiency, fever or epilepsy. 1. Physiological factors: As newborns are just born, all organs and systems of the body are not yet well developed, and all physiological functions are still relatively weak, when stimulated by external factors, the above symptoms are likely to occur; at the same time, the newborns will also stimulate the nervous system to appear shivering and trembling symptoms when they hold their urine. 2. Pathological factors: (1) Calcium deficiency: the lack of calcium is not supplemented in time, leading to a long time of calcium deficiency in the body, which induces nervous system dysfunction and manifests the above symptoms. (2)Fever: due to the relatively low immunity of newborns, when cold or heat stimulation, bacterial or viral infections may lead to increased body temperature, shivering and trembling symptoms. (3) Epilepsy: The above symptoms are induced by hereditary epilepsy or epilepsy caused by acquired stimuli. Parents are advised to find out the cause of the symptoms and give them early treatment to avoid delaying the condition.