There are several possible causes of sudden convulsions in small children: first, there is a possibility of convulsive seizures due to high fever. The second, there may be intracranial diseases, such as persistent seizures. Therefore, it is necessary to clarify exactly what causes the convulsions. If the convulsions occur in a state of high fever, they are generally considered to be febrile convulsions, which need to be treated with anti-inflammatory and anti-convulsive drugs, and in the case of seizures, they also need to go to the hospital in time to check the EEG and cranial MRI, which can exclude the convulsions caused by epilepsy. Regardless of the type of convulsion, it is necessary to ensure that the child keeps the airway open as well as prevent falls to avoid choking or secondary injuries.