Adults with recurrent fevers consider the following causes: 1. viral colds cause recurrent low fever symptoms, and the fever usually reaches about 7-10 days. 2. lung infections or bronchial infections and other reasons, there will be recurrent fevers, rather than a simple, general cold fever. So when there is recurring fever, it is advisable to go to the hospital for blood tests and lung CT tests to understand the condition specifically so as not to delay the condition. If there is an infection, the fever can be cured by using antibiotics for treatment as soon as possible.3. Consider conditions such as urinary tract infection or peritonitis, which cause inflammatory symptoms leading to fever.4. Rheumatic immune and hematologic diseases, which are internal diseases that can also lead to recurrent fever, require relevant tests to be clear.