Citron is the mature fruit of citron or citron, a citrus plant of the Rutaceae family. It is pungent, slightly bitter and sour in taste, warm in nature; it belongs to the liver and spleen, and has the efficacy of dispersing the liver and relieving depression, regulating qi and zhong (regulating the qi of the spleen and stomach to make the functions of the spleen and stomach smooth), and drying dampness and resolving phlegm (removing phlegm in the body with dampness-drying medicines). It is mainly used in the treatment of distension and pain in the chest and ribs due to liver depression, distension and pain in the stomach and abdomen due to stagnation of qi, cough due to phlegm (a pathological product of impaired metabolism of water and liquid), and unfavorable condition of the chest and diaphragm. Oyster is the shell of oyster, Dalian Bay oyster, or oyster, etc. of the genus Oyster, family Oysteridae. It is salty, astringent and slightly cold in nature; it belongs to the liver and kidney meridians, and has the efficacy of calming the liver and submerging yang (suppressing too much yang qi rising in the liver), astringent and solidifying astringency (astringing and consolidating), softening and dispersing knots (softening and dispersing hard knots), and suppressing alarm and tranquilizing the mind. It is mainly used for the treatment of restlessness, palpitation and insomnia; hyperactivity of liver yang (liver yang is excessive, causing dizziness, dizziness, headache and other symptoms), dizziness; phlegm nuclei (subcutaneous lumps swollen up like nuclei), gall tumors (equivalent to thyroid tumors), etc.; spermatorrhea, spermatogenesis, enuresis, urination, urination and other subluxation and other slippery evidence; stomach pains, generalized acidity; lilies; bleeding from wounds; carbuncles, canker sores and swollen poisons, sores and eczema. Drugs need to be taken under the guidance of a professional doctor’s diagnosis, not self-medication, so as not to delay the condition.