The efficacy and function of Diarrhea Huang San is to diarrhea the spleen and stomach fire (fire evil invading the spleen and stomach), mainly for the treatment of dry lips and mouth and other conditions, the patient has a deficiency of yin, fire and heat, cerebral hypoplasia or congenital insufficiency of the tongue caused by the use of Diarrhea Huang San is contraindicated. Laxative yellow powder in the “pediatric medicinal evidence straight secret” has recorded, laxative yellow powder is composed of gypsum, licorice, windproof, patchouli leaves and other ingredients, with the diarrhea of the spleen and stomach volatile fire and other efficacy, can be used for the treatment of the spleen and stomach volatile fire caused by dry lips, thirst, bad breath, eye sores and so on. Laxative yellow powder has the effect of cathartic spleen and stomach fire, if the patient has the symptoms of yin deficiency and heat, generally contraindicated the use of laxative yellow powder. It is recommended that patients be treated with Laxative Yellow San under the guidance of a doctor, and should not use Laxative Yellow San without authorization in order to avoid adverse consequences.