Diet does not have a definite role in the treatment of cough and phlegm, cough and phlegm still need to address the specific causes of treatment and symptomatic treatment, and need to pay attention to dietary modification. 1. Treatment of the cause: for example, if the cough and sputum are caused by bacterial pneumonia, antibiotics such as moxifloxacin and amoxicillin clavulanic acid may be needed; if the cough and sputum are caused by tuberculosis, anti-tuberculosis drugs, such as isoniazid, may be needed. 2. Symptomatic treatment: for example, phlegmolytic drugs such as eucalyptus-pinocampus enteric solution can be used to promote phlegm expulsion. 3. Dietary modification: although diet has no effect on cough and phlegm, improper diet is unfavorable to the recovery of the condition; generally speaking, cough with phlegm needs a light diet and some fruits, such as apples, pears, oranges, and so on. To sum up, cough with phlegm need to carry out dietary modification, but also need to consult a doctor in a timely manner, under the guidance of the doctor individualized treatment.