If the amount of phlegm is not very large, you can first use dietary therapy to treat phlegm, for example, you can eat steamed orange with salt, boil garlic and ice sugar water or drink ice sugar and Sydney water, the effect is better. If the amount of phlegm is relatively large or complicated by serious respiratory system infection, you should use medicine for the treatment of phlegm. Generally, if the symptoms are yellow phlegm, you can use Lung Power Cough Compound, Fresh Bamboo Liqueur, Compound Fresh Bamboo Liqueur, or Niuhuang Serpentine and Chuanbei Liquid for the treatment of phlegm. If the sputum is white, you can use Ambroxol Hydrochloride or Ambrotero Oral Solution for the treatment of phlegm. In addition, when phlegm is present because there is an infection in the respiratory system, appropriate anti-inflammatory treatment can also help dissolve phlegm, such as oral antibiotics for bacterial infections. In the case of viral infections, oral ribavirin or busulfan anti-inflammatory oral solution can be administered. In case of Mycoplasma pneumoniae or Chlamydia infection, azithromycin or roxithromycin can be used for treatment.