There is no such thing as externally applying the most penetrating Chinese medicine, and all medicines need to be used symptomatically in order to have therapeutic effects. Clinically, Chinese medicines that can be used externally include light powder, lead dan and so on. The use must be carried out under the guidance of a doctor.
Light powder is mercury, alum, salt and other mercury compounds made by sublimation, taste pungent, cold, poisonous, belonging to the large intestine, small intestine meridian. It can be used externally to attack poison and kill worms, and taken internally to expel water and reduce swelling. Attention, this product should be taken internally with caution, and should not be taken by weak and pregnant women.
Lead Dan is lead oxide made of lead, pungent, slightly cold, poisonous, attributed to the heart, liver meridian. It has the efficacy of extracting toxins and regenerating muscles, killing insects and relieving itching. Attention, lactating women, children and pregnant women should not use. This product should not be taken internally continuously to avoid accumulation of poisoning.
The use of specific drugs should be carried out under the guidance of a physician, do not use drugs without authorization, so as not to cause adverse reactions.