Large Intestine Fire will present with abdominal distension, abdominal pain, constipation and yellowish urine. Patients can use Da Cheng Qi Tang and other heat diarrhea laxative, drugs should be used under the guidance of a doctor. Large intestine fire is also known as large intestine solid heat syndrome, refers to the heat evil colon, visceral Qi is not manifested by the symptoms. Solid heat in the large intestine is mostly caused by improper diet, consuming unclean food or eating greasy and spicy food, which results in dampness-heat arising from internal growth and turning into heat over a long period of time; or external evils entering into the interior and turning into heat; or emotionally unfavorable and turning into fire. Dachengqi Tang is composed of rhubarb, Houpu, Citrus aurantium, and mannite. Among them, rhubarb, manganite have the effect of laxative; thick park dry dampness; hedgehog breaks the gas to eliminate accumulation, the above drugs together, often used in the treatment of fecal impassability, dry mouth and tongue, umbilical cord and abdominal pain and other conditions. Caution should be exercised in cases of deficiency of qi and yin, constipation, and old age and infirmity.