There is no such thing as “virtual fire or real fire”, according to the 10th edition of the “Diagnostics of Traditional Chinese Medicine” in the eight outline of the identification of heat, the classification of heat evidence has a real heat and virtual heat, tongue coating yellow and thick and rough preliminary identification of real heat evidence. Solid heat syndrome is the invasion of the body, the heat into the body, the evil gas is full but the positive gas is still sufficient, evil and positive competition caused by fever, manifested as high fever, thirst, constipation, yellow tongue coating, pulse number or slippery number, etc., most often in infectious febrile diseases of the high fever. Moss yellow and dry, or even dry and hard moss, coarse particles, look at the brown hand, known as yellow brown moss, for the evil heat injury, dry knot viscera solid signs. Treatment should be sweet and cold to nourish yin, through the lower diarrhea heat treatment principles and methods. Specific medication and treatment needs to be by a traditional Chinese medicine practitioner four diagnosis and reference, diagnosis and treatment later flexible prescription of medication, do not blindly use their own medication.