Mouth icing sugar can expectorate cough is not true, icing sugar does not treat the role of disease. Rock candy is sugar decoction and the formation of a kind of ice crystals, and no treatment of disease, not to expectorate cough, cough phlegm, mainly because of respiratory tract inflammation and infection caused by the need for pathogenic bacteria to take medication, as well as symptomatic treatment. If it is caused by bacterial infection, often need to take antibiotic drugs, such as amoxicillin, cefadroxil. Some patients are mycoplasma infection caused by pneumonia, can take macrolide antibiotic drugs, such as clarithromycin, roxithromycin. In addition, cough with phlegm also need to be combined with cough and phlegm medication, such as ambroxol hydrochloride, ambroxterol, etc., can also use budesonide for nebulized inhalation treatment. Cough with phlegm may also be caused by cough variant asthma, eosinophilic bronchitis, gastroesophageal reflux stimulation of cough, nasal secretion reflux stimulation of cough and other factors, it is recommended that the patient promptly go to the hospital, cooperate with the doctor to take medication, and can not rely on food treatment.