The efficacy of Psidium guajava has the following effects: clearing the lungs and resolving phlegm (removing lung heat and dissolving phlegm), laxative, detoxifying and eliminating carbuncles. 1. Clearing the lungs and resolving phlegm: As a commonly used Chinese medicine, piper betel, with its sweet, slightly bitter and astringent flavor, is often used in the treatment of coughs, phlegm, difficult to cough, etc. caused by lung heat, and is often used in conjunction with almonds, hemixia, zhu lei and other medicines for resolving phlegm and relieving coughs. 2. Laxative: the drug is rich in oil, its nature slippery, can be better laxative, especially for patients with dry stools. 3. Detoxification and elimination of carbuncle: this medicine has the function of clearing heat and detoxification (removing heat and toxicity in the body) and eliminating carbuncle, and it is often used to assist in the treatment of carbuncle of the lungs (coughing, chest pain, fever, coughing and vomiting of fishy-smelling phlegm), carbuncle of the breast, etc. It can be used in the treatment of carbuncle of the lungs. In the treatment of lung carbuncle, it can be combined with Fritillaria and Phellodendron; in the treatment of breast carbuncle (equivalent to acute mastitis), it can be combined with Dandelion and Honeysuckle. If you need to use the medicine, please go to the hospital, under the guidance of the doctor, the matching application, do not unauthorized use of drugs, so as to avoid delaying the condition.