Tongue thick yellow greasy dry mouth with cracks for the evil heat injury, dry knot solid evidence. Evil heat injures the fluid, dry knot internal organs solid evidence for the real heat and dry shit knot with the stomach and intestines, heat and fluid rapid depletion. Clinical manifestations are: inability to pass stools, frequent turning of vector gas (farting), epigastric (abdominal) plumpness (stomach distension and discomfort), abdominal pain and refusal to press, press the hard, or even delirious hot flashes (gibberish), sweaty hands and feet, yellow and dry tongue, or burnt black and dry cracking, and the pulse is solid. The treatment should be to remove the heat knot to save the yin fluid, and treat with Da Cheng Qi Tang. Da Cheng Qi Tang is composed of rhubarb, thick park, manganese nitrate, and citrus aurantium, which has the effect of clearing down the heat knot. If the tongue is thick, yellow and greasy, and the mouth is dry and cracked, you should go to the hospital in time, do not take medication by yourself, so as not to delay the condition.