A continuous fever of about 38 degrees can be caused by a variety of factors, including certain infectious diseases. It can also be caused by infectious diseases, as well as non-infectious diseases. 1. Infectious diseases. Some people have viral infections, or bacterial infections, or mycoplasma infections, which can cause fever and other symptoms. If the disease is not too serious, if the cause is not lifted, there may be a continuous fever of about 38 ℃. 2. Infectious diseases. Infection with certain infectious diseases, such as influenza, viral hepatitis, tuberculosis, as well as malaria and dengue fever, etc., can cause fever symptoms. However, the fever is usually low or moderate, and rarely high. 3. Non-infectious diseases. Some people suffer from connective tissue diseases, or rheumatic diseases, as well as malignant tumors, etc., can cause fever. A continuous fever of 38 degrees Celsius occurs. Continuous fever of 38 degrees need to consult a doctor in time, under the guidance of the doctor to clarify the cause of the disease, standardized treatment.