There is no so-called secret recipe for external application of white mustard seed, white mustard seed can be powdered or acupoint compresses, it is recommended to follow the doctor’s instructions to take. White mustard seed, with warm lung phlegm, diuresis, dispersing knot swelling effect. It is mainly used for cold phlegm, asthma and cough, hanging drinks, yin gangrene (a kind of slow condition of the general term of the negative sores and ulcers) flow injection (issued in the deep muscle of multiple abscess), numbness of the limbs, joints, swelling and pain. White mustard seed is generally used for internal use: decoction; or into the pill, bulk. Externally: grated and applied; acupoint compresses. White mustard seed adverse reactions: white mustard seed oil on the skin mucous membrane has a strong stimulating effect, can cause local congestion, burning pain, and even foaming; internal overdose can cause vomiting, abdominal pain, diarrhea. Long-term cough and lung deficiency and yin deficiency and fire (Yin essence deficiency in the body, the appearance of hyperactive fire) should not be used. If you need to use white mustard seed, must be used under the guidance of a professional doctor.