Phlegm and cough may be caused by allergic cough, chronic pharyngitis, chronic bronchitis and other diseases, which can be relieved by general treatment and medication. 1. Allergic cough: When exposed to allergens, it can lead to inflammatory reactions in the patient’s airways, causing irritating cough, which may include white sputum and other symptoms. First of all, clarify the allergens and keep away from allergens. If the symptoms are severe, antihistamines such as loratadine and cetirizine can be used to relieve the symptoms. 2. Chronic pharyngitis: some patients have chronic pharyngitis, which can be manifested as when the throat is irritated, there will be throat itching, coughing, coughing up phlegm and other symptoms, you can use compound borax solution, compound chlorhexidine gargle solution and other gargles or take throat tablets to relieve the symptoms. 3. Chronic bronchitis: in the stabilized period, general treatment can be used to quit smoking, pay attention to warmth, prevention of infection and so on. If there is evidence of bacterial infection during acute exacerbation, antibiotics such as azithromycin and amoxicillin can be used for anti-infective treatment, and cough expectorants such as compound licorice and aminoglutethimide can be used to relieve symptoms. Phlegm, cough can be caused by a variety of diseases, if the symptoms are not relieved or aggravated, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to clarify the cause of the disease and standardized treatment. During the period of illness, you should eat a light diet, drink plenty of water, avoid spicy and stimulating food, have a regular routine, avoid staying up late and get enough sleep.