Twitching and shivering in infants may be caused by vitamin D and calcium deficiency, incomplete development of the nervous system, and fever. 1. Vitamin D and calcium deficiency: lack of vitamin D will affect the absorption of calcium, and vitamin D and calcium deficiency will lead to twitching and trembling in infants. Calcium and vitamin D supplementation can be administered under the guidance of a doctor. 2. Incomplete development of the nervous system: The development of the nervous system of infants is still incomplete, and certain movements may be affected by the generalization of nerve conduction, which may lead to convulsive trembling. After ageing, the development of the nervous system is gradually complete, and will usually be relieved on its own. 3. Fever: Since the development of the nervous system of infants is not yet complete, the thermoregulation of the nerves is relatively weak. A rapid rise in body temperature in infants can lead to abnormal nerve discharges in the brain, resulting in febrile convulsions and symptoms of convulsions and shivering. Need to go to the hospital, can use drugs to reduce body temperature, common acetaminophen suppositories, etc., need to follow the doctor’s advice to use. Parents are advised to take their children to regular hospitals as soon as possible, complete the relevant examinations, and clarify the cause of the disease, so as not to cause serious consequences. The above medication should be used in accordance with medical advice.