A common cause of recurrent fever in diabetic patients is co-infection, which needs to be clarified under the guidance of a doctor to determine the specific cause and treatment. Diabetic patients with low immunity, easy to complicate a variety of infections, the most common is the combination of upper respiratory tract infections, combined lung infections such as tuberculosis, urinary tract infections such as cystitis, due to the pathogenic effect of inflammatory factors may be recurrent fever, should be actively monitoring the body temperature, pay attention to the presence of coughing, coughing sputum, runny nose, urinary frequency, painful urination, nausea, vomiting and other symptoms, should be clarified under the guidance of the doctor. There are many reasons for recurrent fever in diabetic patients, and patients are advised to seek timely medical treatment.