the separation can be reduced by frying. Fried white mustard seed is made from raw white mustard seed by frying. After frying, the separation of white mustard seed is reduced. White mustard seed is warm, and has the functions of warming lung, resolving phlegm, benefiting qi, dispersing stagnation, dredging collaterals and relieving pain. It can also be used to treat yin gangrene and toxic swelling caused by phlegm-dampness flowing, numbness of limbs or joint swelling and pain caused by phlegm-dampness blocking meridians.