The effects of Pumice Stone include clearing lungs and resolving phlegm (removing heat from the lungs and dissolving phlegm), and softening and dispersing knots (softening and dispersing hard lumps), and it is often used to alleviate symptoms of phlegm-heat coughs, gall tumors (the equivalent of thyroid tumors), sores and swellings, and other discomforts. 1. Clearing the lungs and resolving phlegm: Pumice has a salty taste and cold nature, and enters the lung and kidney meridians, and has fine holes inside and a lighter mass, very similar to the structure of the human lungs. The Chinese medicine pictorial idea is that pumice has the efficacy of clearing the lungs and resolving phlegm, and it can alleviate and improve the symptoms of lung-heat cough, phlegm-heat cough, phlegm-thickness with yellowish color, and bronchitis. 2. Softening and dispersing knots: Pumice Stone also has a certain degree of softening and dispersing knots, which can be used to alleviate and improve stubborn mucous phlegm, lymphatic tuberculosis, etc., and has a more positive effect on assisting in the treatment of astringent pain in urination and metabolism of urine and ketones. If the patient appears uncomfortable symptoms, it is recommended to go to the hospital for examination and diagnosis in a timely manner, clear the cause of the targeted treatment, do not take medication on their own.