Psidium guajava has the efficacy of clearing lung and resolving phlegm (removing lung heat and dissolving phlegm), relieving chest and dispersing knots (relieving knots of qi in the chest); it is mainly used for treating lung-heat cough and plagued pains in the chest and ribs (chest and ribs area collectively). The general dosage of decoction is 9-12g. Psidium guajava, the rind of Juniperus communis and bilateral Juniperus communis, family Cucurbitaceae. Clinically, it is mainly used to treat lung-heat cough, chest and hypochondriac pain, sore throat, breast fetish (pain and lumps in the breast, closely related to menstrual cycle and emotional changes, equivalent to mammary hyperplasia) and breast carbuncle. Note that Psidium guajava should not be used with Chuanwu, Prepared Chuanwu, Caowu, Prepared Caowu, and Psidium. If the patient has any discomfort, please go to the regular medical institutions; if you need to use Psidium guajava, must be used under the guidance of a professional doctor.