Cough and persistent low fever are mainly considered to be caused by inflammatory diseases of the respiratory tract. Need to use anti-inflammatory drugs and cough, phlegm drugs for treatment. If the persistent low fever and cough do not improve, you need to go to the regular hospital to hang up the respiratory medicine department for examination. Generally, it is necessary to do routine blood tests, chest X-ray examination, and sputum culture examination. If there is tuberculosis infection, it is also easy to cause persistent low fever, cough, and also easy to have generalized weakness and night sweats. After the diagnosis is confirmed, it can be treated with anti-TB drugs, the more commonly used drugs are rifampicin, isoniazid, streptomycin and other drugs, which need to be treated with combined and regular medication.