When the body is hot, thin, dry mouth and no sweating, traditional Chinese medicine (TCM) practitioners tend to consider it as a condition caused by yin deficiency and fire exuberance (deficiency of yin and essence in the body, resulting in hyperactivity of deficiency fire). Yin deficiency and exuberant fire is a disease of traditional Chinese medicine, which refers to the deficiency of yin fluid in the body, which can not restrain yang heat and lead to the appearance of deficiency heat, five heart-heat (heat in the hearts of the hands and feet, and self-consciousness of the heart and chest), dry mouth, emaciation, and other manifestations. Body burning, emaciation, dry mouth, and lack of sweating can also be seen in the disease of thirst, which is known as diabetes mellitus in Western medicine. It can also be seen in hyperthyroidism and other diseases. It needs to be further diagnosed according to other symptoms before judgment. The appearance of the body hot, lose weight, dry mouth, do not sweat need to promptly check the body temperature, to see if it is caused by fever and cold and other diseases. Under the guidance of the doctor, the cause of the disease should be clarified and then actively treat the evidence. Do not treat yourself, so as not to delay the condition.