Wei, Qi, Ying and Blood (the deepest stage or disease site among the four periods of Wei, Qi and Blood in warm-heat disease) is a method of identification, which refers to the warm-heat disease evil invading the muscle surface, internal organs, heart and spirit (no specific site), and yin and blood (no specific site), respectively. Wei qi ying blood is a method of diagnosis used by Ye Tianshi for the treatment of exogenous warm-heat disease, representing 4 pathological stages of warm-heat disease with different depths and severity of the evil. Wei points: the stage of evil invading the muscle surface, commonly seen in the initial stage of warm-heat illness. The main clinical manifestations include fever, slight chill (fear of cold), headache, dry mouth and slight thirst, red tongue edges, thin yellow moss, and floating pulse, etc. The main clinical manifestations include fever, slight chill (fear of cold), headache, dry mouth and slight thirst, red tongue edges, thin yellow moss, and floating pulse. Qi points: Evil qi is gradually transmitted internally to the viscera stage, and the human body is in the state of being full of evil blaze. The main clinical manifestations are fever, no cold, sweating and thirst, yellow urine, red tongue and yellow moss, and strong pulse. Ying points: the evil heat is trapped inside, Ying Yin is damaged, the heart and spirit are disturbed, belonging to the more serious stage of the development of warm-heat disease. The main clinical manifestations include body heat at night, thirst, insomnia, even delirium tremens (confusion, babbling), and addictive rash on the skin. Blood division: Evil heat penetrates deep into the camp blood, leading to movement of blood, wind and depletion of yin, which is the most profound stage in warm-heat disease. The main clinical manifestations are concomitant asthma and chest pain on top of the camp component, constipation and abdominal distension, abdominal pain and refusal to be pressed, and even epilepsy, or persistent low-grade fever that does not go away, emaciation, dry mouth and throat, and so on. If there is any discomfort and medication is needed, please go to the hospital and use the medication under doctor’s guidance.