Powdered shellfish can be taken directly with boiled water, but the effect is limited and generally falls short of therapeutic effect. Bei Mu is the abbreviation of Chuan Bei Mu and Zhe Bei Mu. It has the efficacy of clearing away heat and resolving phlegm, moistening the lung and relieving cough, dispersing knots and eliminating swelling. It can be used to treat cough due to deficiency labor, lung-heat dry cough, scrofula (mainly refers to cervical lymph node tuberculosis), breast carbuncle, lung carbuncle. Zhe Bei Mu Powder has the effect of clearing away heat, resolving phlegm, dispersing knots and eliminating carbuncle (evacuating knots and eliminating carbuncle poison). It is used for treating wind-heat, phlegm-heat cough, scrofula, gall tumors (equivalent to thyroid tumors), mammary carbuncle sores, and lung carbuncle. It should be noted that powdered shellac should not be used with aconite. If you need to take it with boiled water, it is recommended to use it under the guidance of a professional doctor.