It can be used to clear the lungs and resolve phlegm (clearing heat from the lungs and dissolving phlegm), and to improve the throat and the voice; it can be taken in boiling water or decocted. It can be used in boiling water or decoction. It has the effects of clearing lung heat and resolving phlegm, relieving phlegm and opening up the voice, and moistening the intestines. Clinically, it is mainly used in treating lung-heat and dry cough, dry and painful throat, hoarseness, internal heat of bone vapor and vomiting, epistaxis, blood in stool, red eyes at times, wind-fire and toothache, and constipation with heat knot. Be cautious of Fat Hai for those with cold spleen and stomach (spleen and stomach weakness and cold) diarrhea. The adverse reactions and contraindications of Fenghuang Hai are not clear at present. If patients have any discomfort, please go to a regular medical institution; if you need to use Fat Hai, it must be used under the guidance of a professional doctor.