Fever after gastroenteroscopy may be due to cold, gastroenteritis, etc., which can be relieved by physical cooling and medication. 1. Physical cooling: If the patient’s body temperature fluctuates between 37.3-38.5℃, physical cooling such as undressing and exposing the limbs, rubbing the limbs with alcohol, and applying ice packs can be carried out to lower the temperature. At the same time, the patient is advised to drink more water to avoid dehydration after fever. 2. Medication: Firstly, antibiotics such as levofloxacin and amoxicillin can be used for anti-infection treatment. Secondly, antipyretics such as acetaminophen and ibuprofen suspension can be used to relieve the symptoms of fever. If necessary, rehydration therapy. At the same time, pay attention to dietary modification, with warm, soft and easily digestible food, pay attention to keep warm. Fever after gastroenteroscopy, there are other causes, such as cholecystitis, lung infection, etc., to go to the hospital as soon as possible, improve the relevant examination, such as blood routine, blood culture, etc., to clarify the diagnosis, symptomatic treatment. The above mentioned drugs should be taken under the guidance of a professional doctor.