Gypsum in traditional Chinese medicine should be boiled for thirty minutes because gypsum belongs to the ore type of medicine and the active ingredients of the medicine are not easy to be decocted. Gypsum belongs to the ore class of drugs, its main ingredient is hydrated calcium sulfate, which is difficult to dissolve in water. Gypsum has the efficacy of clearing heat and fire (removing heat and fire from the body), removing vexation and quenching thirst, and is commonly used clinically for treating high fever and dizziness, thirst and vexation, and headache, toothache and other discomforts caused by excessive stomach fire; It is generally recommended to decoct gypsum for thirty minutes after breaking it, which is more conducive to the precipitation of the active ingredients, and then put other herbs into the decoction for about half an hour, which is more conducive to the effect of gypsum in clearing heat and diarrhea. In addition, it is important to avoid spicy and stimulating food during the period of taking the medicine to prevent aggravating the symptoms of heat. If you need to use medication, please use under the guidance of a physician.