The difference between Da Trap Thorax Tang and Xiao Trap Thorax Tang lies in the different composition, efficacy and main treatment of the drugs. 1. Big Trapped Chest Soup is mainly composed of rhubarb, glycyrrhiza glabra, and manganese nitrate; Small Trapped Chest Soup is mainly composed of rhubarb, hemixia, and gua vulgaris. 2. Da Shen Chest Tang has the efficacy of diarrhea heat and water expulsion, and is used for the treatment of large knot chest syndrome, which is characterized by pain under the heart, refusing to be pressed, hard to be pressed, or pain under the heart or at least hard fullness of pain in the abdomen and pain can not be approached, constipated stools, daytime Asr hot flashes, or shortness of breath and irritability, etc. The medicine is strong and fierce. Great Trap Thorax Soup is strong and fierce, stopping in the disease (for medicinal drugs, the disease should be stopped after healing, so as not to damage the body), in order to prevent overdose and injury to the right; vegetarian body weak people should be used with caution. Small Trapped Chest Soup has the efficacy of clearing away heat and resolving phlegm, broadening the chest and dispersing knots, used for the treatment of phlegm-heat interconnection of small knotted chest evidence, the symptoms see the heart under the plump (mainly refers to the stomach distension and discomfort) stuffy, painful when pressed, or heart and chest tightness, or coughing up phlegm yellow and thick, etc.. The adverse reactions and contraindications of Xiao Trap Thorax Tang are not clear. Discomfort should seek medical treatment in time, under the guidance of the physician’s diagnosis and selection of medication, not self-medication, so as not to delay the condition.