Every time after the fever is accompanied by a cough may be acute respiratory tract infection, pneumonia, tuberculosis, malignant tumors and so on. 1. Acute respiratory tract infection is a common disease that can cause fever and cough, which can be caused by bacterial or viral infection. 2. Pneumonia, due to bacterial or viral infection causing fever, while the mucous membrane of the trachea and bronchial tubes is damaged, resulting in coughing. 3. Tuberculosis, due to the infection of tuberculosis bacillus, the symptoms of low-grade fever and dry cough can appear, which is the typical symptom of tuberculosis. 4. Malignant tumors, as tumors can cause recurrent fever, accompanied by respiratory symptoms such as cough and sputum. 5. Lung injury in immune-related diseases, such as interstitial fibrosis caused by rheumatoid arthritis, which may also present symptoms such as cough and fever. 6. Allergic pneumonitis, when changing to a new living and working environment, and when exposed to more dust, allergic pneumonitis may occur, manifested as cough, fever, and the migratory course of the disease will be followed by pulmonary fibrosis. In addition, for the combination of reflux esophagitis, nasal secretions stimulate the throat can also lead to repeated cough. Specific causes need to be clarified after medical examination, and timely specialist consultation for treatment.