Fever after vomiting in children is mostly caused by the following: 1. digestive system diseases, most commonly such as unclean diet, over-eating, and cold, appendicitis, etc., which need to be judged by local doctors and given relevant treatment; 2. neurological diseases, such as viral encephalitis and bacterial meningitis, which can also cause similar symptoms; 3. respiratory system diseases, such as pneumonia and bronchitis, which not only affect the respiratory tract after the onset It can also affect the digestive tract. After going to the hospital and completing relevant tests under the guidance of a physician, a clear diagnosis can be made and promptly treated, such as anti-infection, antiemetic and rehydration. 4. Systemic infections can also occur and are often accompanied by other infection symptoms.