One-year-old babies with fever and convulsions are considered to be convulsions caused by infection-related factors, and the main causes include the following: First, febrile convulsions, if there are diseases such as upper respiratory tract infection or outbreak of early childhood acute rash, which can lead to fever and febrile convulsions. Second, toxic encephalopathy, if there is bronchopneumonia, bacterial dysentery and other more serious infectious diseases, will appear toxic encephalopathy leading to convulsions. Third, intracranial infection, if there is encephalitis, meningitis and other neurological infections, it will lead to fever and convulsions, and cerebrospinal fluid examination is needed to make a clear diagnosis. Fourth, epilepsy, infection and fever are triggers for seizures, and EEG examination is needed to make a clear diagnosis.