The efficacy of the Chinese herb talc is that it can diuretic and laxative, clear heat and relieve summer heat, and can be used externally to collect dampness and astringent sores. It is often used clinically to treat diseases related to the urinary tract, like urinary tract infections and urinary stones, with good results. By using talc externally, it can significantly treat eczema and even prickly heat, and the effect is also good. Talc is often ground for oral use, and has certain anti-emetic and anti-diarrheal functions for the gastrointestinal tract, and can prevent the absorption of toxic substances in the gastrointestinal tract. Clinical application should pay attention to the dosage, too large a dose is likely to produce certain side effects. The contraindication of talc is that large doses can cause damage to the spleen and stomach, and talc can cause the possibility of polyps in the body, so patients with intestinal polyps should never apply talc, patients with a weak spleen and stomach can not be applied, pregnant women should not be applied.