The generic name of Laosha is salammoniac, which generally refers to the medicinal salammoniac, which is known for its efficacy in eliminating stagnation, softening hardness, breaking up blood stasis, and dispersing knots. It can be used for symptoms such as choking, hiccups and regurgitation, and coughing with phlegm (a pathological product of impaired water metabolism). Salammoniac is a halide-like purple rock salt ore, salty, bitter, pungent and warm in nature, with a certain degree of toxicity, attributed to the liver, spleen and stomach meridians. It is mainly used internally for eye redness and swelling pain, phlegm and cough, amenorrhea in women and other conditions, and externally it can be used to treat polyps, furuncles (mostly occurring on the limbs or face sores, small in shape with deep roots, hard as nails), carbuncles and other canker sores with a certain degree of effectiveness. The drug should be used with caution, as it has certain effects of breaking up bruises and dispersing knots, therefore, it should not be used by pregnant women. If you need to use this medicine, it is recommended to use it under the guidance of a professional physician to identify the symptoms, and not to take it on your own to avoid delaying your condition.