Coughing up yellow sputum in patients with chronic bronchitis indicates the presence of bacterial infections, such as those caused by sensitive bacteria, and cephalosporin antibiotics are usually effective in combating infections for about a week. Because chronic bronchitis is a chronic disease, it is usually not completely cured, only effective control of symptoms. Chronic bronchitis is a chronic non-specific inflammation of the trachea, bronchial mucosa and its surrounding tissues, the cause of which is still unclear. Clinically, the main manifestations of cough, cough sputum and other discomforts; when coughing yellow sputum symptoms, may be considered to be caused by bacterial infection. If cephalosporin antibiotics sensitive bacteria caused, the general course of treatment for about 7 days can relieve the symptoms of coughing yellow sputum. If the symptoms are not relieved after cephalosporin treatment, it is recommended to take sputum culture + drug sensitivity test to choose the sensitive antibiotic treatment; at the same time, it can also be combined with the treatment of cough and phlegm medication, such as aminoglutethimide hydrochloride, bromhexine and so on. When the above symptoms appear, it is recommended to go to the hospital in time for early and regular treatment to avoid delaying the condition.