Shaoyang Disease is the name of the disease, which is one of the six meridian diseases in the Treatise on Typhoid Fever. It refers to the stage when the disease has left the surface of the sun and has not yet entered the interior of Yangming, and the disease is in the half-expression and half-ri. The mechanism of the disease is that the evil has violated the Shaoyang, and the positive and evil are competing with each other in the half-expression and half-li, so that the qi is not smooth, and the elevation is unfavorable. The main symptoms are bitter mouth, dry throat, dizziness of the eyes, heat and cold, fear of cold, fear of heat, bitter fullness of the chest and ribs (the front and sides of the chest feel distended and uncomfortable), no desire to eat and drink, upset and nausea, and stringy pulse. Analysis of Shao-Yang Disease: Cold and heat are the result of the struggle between righteousness and evil between the surface and the inside; heartburn and bitterness in the mouth, vomiting and lack of desire for food are the result of heat depletion of Shao-Yang, unfavorable meridian qi, and the gallbladder’s heat attacking the stomach; dryness of the throat and dizziness are the result of the gallbladder’s fire being inflamed, and the heat injuring the body’s fluids; Shao-Yang meridian runs in the chest and ribs and the evil depletion of Shao-Yang meridian is the reason why there is a bitter fullness of chest and ribs. Treatment should be based on the principle of reconciling the Shaoyang, with Xiao Chaihu Tang as its representative formula. If you have any of the above discomforts, please consult a doctor in time and use medication under the guidance of a Chinese medicine practitioner for diagnosis and treatment, and do not use medication privately, so as to avoid delaying the condition.