Herbal medicines for clearing yellow, old and sticky phlegm include Mulberry leaf, Fritillaria, Psidium guajava and Tangerine red. 1. Mulberry Leaf: Mulberry leaf has the effects of clearing the lungs, moisturizing dryness and evacuating wind-heat. The drug can be used to treat cough caused by lung heat, coughing up sticky phlegm, old phlegm, yellow phlegm and other symptoms, and its adverse reactions and contraindications are not yet clear. 2. Fishweed: Fishweed has the efficacy of clearing lung heat, eliminating carbuncle and discharging pus (eliminating carbuncle and discharging pus). Fishwort can be used to treat lung-heat cough, carbuncle spitting pus, if the patient has yellow phlegm, old phlegm, sticky phlegm, you can follow the doctor’s instructions to use Fishwort to remove phlegm. It is not to be taken by people with deficiency cold syndrome and yin sores. 3. Psidium guajava: The function of Psidium guajava is to clear the lungs and dissolve phlegm (clearing lung heat and dissolving phlegm), and dispersing knots, so it can relieve lung-heat cough and coughing up yellow phlegm, old phlegm and sticky phlegm. Psidium guajava is cold and slippery in nature, so it should be used with caution in cases of loose stools (thin and unformed feces) and damp or cold phlegm, and should not be used in conjunction with Chuanwu, Caowu, or Psidium. Patients with yellow phlegm, old phlegm and sticky phlegm are advised to use the medicine under the guidance of a doctor and not on their own.