1. Shao-Yang syndrome of typhoid fever: alternating fever and chills (fear of cold), distension and fullness in the chest and ribs, poor diet, irritability and desire to vomit, bitter taste in the mouth, dryness in the throat, thin white coating on the tongue, stringy pulse, and so on. 2. Heat entering the blood chamber syndrome: women who feel external evils during menstruation or after childbirth when the dirty blood has not been drained out, with alternating fever and cold, abdominal distension, and unconsciousness. 3. Xiao Chaihu can also be used to treat malaria, jaundice and internal injuries and miscellaneous diseases with Shaoyang syndrome. The adverse effects and contraindications of Xiao Chaihu Tang are not clear at present. Avoid smoking, alcohol, spicy, cold and greasy food during the period of taking, and should not take tonic Chinese medicine at the same time. When taking Xiao Chaihu Tang, it is necessary to go through professional diagnosis, do not take medicine without authorization, so as to avoid delaying the condition.