Viral infections can cause fever. Fever caused by common viruses has mild symptoms and may clear up on its own. In severe infections, such as influenza virus and coronavirus, the fever may not resolve on its own. There are more types of viruses, such as rhinoviruses, coronaviruses, adenoviruses, influenza viruses, respiratory syncytial viruses, varicella zoster virus, measles, mumps, and rubella virus infections. Most viral colds are self-limiting, such as common viruses that cause upper respiratory tract infections and elevated body temperatures, and patients may get better on their own over time. More serious infections, such as influenza virus and coronavirus infections, may lead to fever, while most patients cannot recover on their own, it is recommended to visit the Department of Infectious Diseases in the hospital and give treatment with the doctor’s advice, which is helpful for the recovery of the disease. To summarize, there are more types of viral infections, and the clinical manifestations of patients are also different, it is recommended to visit the Department of Infectious Diseases of the hospital in time, and be treated under the guidance of doctors.