Heat evil, a cause of disease, is a collective term for evils that predispose to yang-heat disorders. The pathogenicity of Heat Evil is characterized by the emergence of hot, yang solid evidence, often juxtaposed with or confused with Fire Evil. It usually manifests as fever with thick resting, redness, swelling and constipation. Heat evil may be caused by frequently eating cold, spicy and stimulating foods or staying up late in daily life. External heat evil is due to the weakness of the human body, the lack of positive qi, wind-heat evil attack on the human body caused by fever, sore throat, redness, swelling, dry cough and other symptoms. Patients are advised to adjust their diet, pay attention to rest, and exercise moderately. In addition, other conditions can also lead to heat evil, should go to the hospital in time for examination, after clarifying the condition, under the guidance of the doctor for appropriate treatment, do not self-medication, so as not to delay the condition.