A cough that has not cleared up for a week is likely to be a respiratory infection that is spreading downward and may cause bronchitis or pneumonia. At this time, a chest CT or plain film must be done to confirm the diagnosis. If pneumonia does exist, hospitalization is required for infusion therapy, and oral medications are often not effective enough. In addition, blood tests and C-reactive protein should be done. If there are elevated white blood cells in the routine blood, it may be a bacterial infection, and antiviral drugs can be applied to recommend intravenous levofloxacin or penicillin for anti-inflammatory purposes. If the C-reactive protein is simply elevated, it is often a viral infection and antiviral medication can be applied. In addition, coughing for a week may also be accompanied by cough variant asthma, which requires a clear diagnosis and then the use of Symbicort to relieve the symptoms of coughing.