The main causes of fever and sleeping with a startle in children include the following. First of all, it is caused by the children’s febrile convulsions, if the children suffer from febrile convulsions, in the children’s body temperature rising period, often appear the manifestation of convulsions. Some children’s convulsions are generalized spasmodic convulsions, while some children’s convulsions are often manifested as sleeping with a startle. In this case, parents should closely observe, if the child has a prolonged period of convulsions and other symptoms, the main child should be timely treatment to stop the convulsions. For example, parents need to apply chloral hydrate to children. Secondly, it is caused by vitamin D deficiency rickets, in this case, the child will also appear to sleep with a startle, and will be accompanied by sweating more, and the child will be accompanied by sleep and screaming and other symptoms.