When you go to the hospital with fever, you should first see the Emergency Medicine Department or the General Internal Medicine Department or the Respiratory Medicine Department. Under the current policy of prevention and control of the new coronavirus outbreak, most hospitals have set up fever clinics, which are the first place to go for fever. Fever is a symptom that can be caused by a number of systemic diseases. Common causes are acute upper respiratory tract infections, pneumonia, bronchitis, acute gastroenteritis, acute pyelonephritis, and acute urinary tract infections, etc. It is best to check the routine blood tests at the fever clinic first. If the blood routine suggests elevated white blood cells, bacterial infection, combined with the patient’s symptoms, whether there is nasal congestion, runny nose, sore throat, cough, cough sputum and other respiratory symptoms, whether there is abdominal pain, diarrhea, nausea, vomiting and other gastrointestinal symptoms, whether there is frequent urination, urgency of urination, pain in urination, lumbago and other urinary system symptoms, then you can probably determine the site of the infection, to find out the cause of the disease before you can be able to use the appropriate medication to treat the symptoms.