The harm of distraction wood is not yet clear, there is no relevant clinical reports. Distracted wood is the dried woody septum of the kernel of walnut fruit of Walnut family, it is flat in nature, bitter and astringent in flavor. The contraindications and precautions of this product are not clear at present. Avoid smoking, alcohol, spicy, greasy and cold food during the medication. If used with other drugs, you need to consult your physician first to avoid causing adverse reactions. If there is no relief or even aggravation of symptoms after taking the drug, timely hospital consultation is required. If you need this product, you should use it under the guidance of a traditional Chinese medicine practitioner, do not take it on your own to avoid causing adverse consequences.