There is no fastest way to resolve phlegm and stop coughing. According to the different causes of colds, chronic bronchitis and chronic obstructive pulmonary disease, cough and phlegm, anti-infection and mucus phlegm dissolving treatments should be carried out. 1. Colds, if the cough and phlegm are caused by colds, cough and phlegm treatment is generally adopted, using cough syrup, ambroxol and other drugs can be effectively controlled. 2. Chronic bronchitis, take conventional anti-infective treatment, such as levofloxacin, etc. to control the infection and relieve cough and sputum and other symptoms. 3. Chronic Obstructive Pulmonary Disease (COPD), one of the most common diseases with cough and phlegm, can use acetylcysteine effervescent tablets to dissolve mucous phlegm, and at the same time, repeated patting of the back with both hands in a hollow shape, to help mucous phlegm come off, and coughing up phlegm more smoothly. However, the specific cause of the disease and the use of drugs also need to consult a doctor in a timely manner, according to the doctor’s instructions for examination and treatment.