The contraindications of Niu Huang are not clear, but Niu Huang should not be used in non-solid heat syndrome, and pregnant women should be cautious of using Niu Huang. Niu Huang has the efficacy of resolving phlegm and opening the orifices (opening the orifices of the heart and restoring the mind by removing phlegm), cooling the liver and quenching the wind (quenching the wind of the liver by removing the fire of the liver), etc. It is also used in the treatment of heat illnesses and pediatric convulsions. Niu Huang is used in the treatment of fever and neuralgia, pediatric convulsions (pediatric diseases with neuralgia, convulsions and convulsions as the main manifestations), epilepsy, mouth and tongue sores, sore throat, toothache, carbuncle and gangrene (a kind of poisonous sores, acute suppurative diseases occurring on the surface of the body, limbs, and internal organs), furunculosis (a kind of skin disease referring to the severe degree of furuncle). If you need to use Niu Huang, you must use it under the guidance of a medical professional.