If adults have recurrent low fever, there are usually several types of diseases as follows: First, infectious diseases usually due to bacterial, viral, mycoplasma or fungal infections in the body, at this time, you need to go to the hospital to check the routine blood and C-reactive protein, to test whether the infection factors and lead to low fever. If the infection is the cause, symptomatic anti-inflammatory drugs or anti-infective treatment can be applied. Most of them can relieve recurrent low fever. Second, if common non-infectious factors also cause recurrent low-grade fever, such as immune diseases, connective tissue disease rheumatic fever, rheumatoid arthritis, systemic lupus erythematosus, dermatomyositis and other diseases and tuberculosis after the low-grade fever, you should take non-steroidal anti-inflammatory drugs at the same time to improve the relevant examination and treat the cause. Thirdly, if the recurrent low fever in adults is caused by endocrine factors or other causes of immune deficiency, such as AIDS, tumor, anemia, etc., medication must be applied to treat the original disease in order to relieve the recurrent low fever.