Walnut kernel bark, also known as the distraction wood, has a certain astringent astringent shrinkage of urine, stopping bleeding and stopping the band, stop diarrhea and dysentery effect. Walnut kernel skin for walnut plant walnut kernel within the woody septum. Its taste is bitter, astringent, flat, to the spleen, kidney meridian, has a certain astringent urine, stopping bleeding, stopping diarrhea effect. Walnut kernel skin is mainly used for the treatment of spermatorrhea, urination, leakage (excessive menstrual flow or more than a few drops), hypoglossia, diarrhea, dysentery and other diseases. Walnut kernel skin adverse reactions and contraindications are not yet clear. Discomfort should seek medical attention, if the need for medication, it is recommended to use the drug under the guidance of a professional physician to identify the evidence, not blindly self-medication.