Gua Biao Hovenia is often used in the treatment of phlegm-heat knot chest syndrome, that is, phlegm and heat in the chest and diaphragm, to the chest of the annoying heat (irritability and sultriness), plagued with distension and pain, coughing and spitting yellow sputum, or heart and chest tightness, or epigastrium, hard fullness, pain when pressed, the tongue is red with yellowish greasy coating and slippery pulse, etc., as a common symptom of the syndrome. It is recommended that patients follow the doctor’s instructions for the preparation of the application. Psidium guajava, sweet, slightly bitter, cold in nature. Attributed to the lung, stomach, large intestine meridian. It has the efficacy of clearing away heat and phlegm, broadening the chest and dispersing knots, moistening dryness and sliding the intestines. It is used for lung-heat cough, phlegm and yellowish thick, chest paralysis and heart pain, chest plumpness (stomach distension and discomfort), breast carbuncle, lung carbuncle, intestinal carbuncle (carbuncle that occurs in the intestines and bowels, manifested by fever, pain in the right abdomen, and palpable lump), constipation, and so on. Citrus aurantium, bitter, pungent, sour, slightly cold in nature. It belongs to the spleen and stomach meridians. It has the effect of destroying Qi and eliminating stagnation, resolving phlegm and dispersing lumps. It is used in treating internal stagnation, plumpness, distension and pain, diarrhea and dysentery, inability to pass stool, phlegm stagnation and gas obstruction, chest paralysis, knotting of the chest, and prolapse of organs. It should be used with caution for pregnant women. Patients are advised to standardize the use of medication under the guidance of traditional Chinese medicine practitioners.