Coughing for a week with white sputum may be caused by acute bronchitis, upper respiratory tract infection, pharyngitis and other diseases. 1. Acute bronchitis: it is an acute inflammation of the mucous membrane of the trachea-bronchus caused by biological, physical and chemical stimuli or allergies. Usually, the onset of the disease is more acute, the systemic symptoms are mild, and there may be fever. If it is caused by viral infection, it can be manifested as dry cough or cough, cough white sputum symptoms, and then the amount of sputum increases, coughing intensifies, occasionally accompanied by blood in the sputum. 2. Upper respiratory tract infection: most of the upper respiratory tract infections are caused by viral infections, mainly manifested as nasal congestion, runny nose, cough, cough sputum, sore throat and other symptoms. Coughing sputum is mainly white foamy sputum or white sticky sputum. 3. Pharyngitis: often pharyngeal secretion discharge, manifested as cough, cough white sputum symptoms, can also have pharyngeal discomfort, foreign body sensation, itching, burning, dryness or irritation and other symptoms. Cough with white phlegm for a week can also be caused by other diseases. If the symptoms are not relieved or aggravated, you should go to the hospital for examination, to clarify the cause of the disease, under the guidance of the doctor to take reasonable treatment, do not blindly use medication, so as not to delay the condition.