Pediatric fever after convulsions may be caused by brain diseases, such as meningitis, etc.; gastrointestinal diseases, such as acute gastroenteritis. 1. Meningitis: Meningitis is an acute inflammatory disease of the cerebral spinal cord membrane caused by pathogen infection, and its main manifestations are fever, headache, nausea and vomiting, convulsions, etc. The patient’s fever after convulsions may be caused by meningitis. 2. Acute gastroenteritis: Acute gastroenteritis is an acute inflammation of the mucosa of the gastrointestinal tract, which may cause fever after convulsions when the patient’s condition is more serious. In addition, poisoning, parasitic diseases, metabolic disorders, etc. may also cause fever after convulsions, it is recommended that the patient consult a doctor in a timely manner for examination, to clarify the cause of the disease for targeted treatment.