The adverse reactions of traditional Chinese medicine are biased, which was also called "poison" in ancient times. Traditional Chinese medicine can "seek advantages and avoid disadvantages" to achieve the purpose of treating diseases. It is possible that if the processing is not standardized, improper use or excessive dosage, it will cause adverse reactions of aconitine poisoning, such as nausea and vomiting, numbness of limbs, dizziness, dyspnea and dilated pupils. Inconsistency between doctor and syndrome: TCM is good at syndrome differentiation and treatment. The syndrome differentiation is wrong, the pathological state of yin and yang is aggravated, and the dose is improper. Traditional Chinese medicine should be used according to syndrome differentiation, and the dosage of each medicine should be appropriate. It varies from syndrome to syndrome, from prescription to prescription, from person to person, from place to time, and the dosage is adjusted according to the change of illness. If the dosage is too large or unconventional, there will be adverse reactions. Improper decoction or long-term use: Chinese medicine decoction should be decocted in time according to the medicinal properties, texture and prescription requirements, otherwise it will easily cause adverse reactions. Gender, age and physical factors: Literature reports that women have more adverse drug reactions than men. For some newly developed medicinal materials or preparations, people do not understand their medicinal properties, or do not read the instructions in detail, and do not understand their taboos and precautions. Abuse will cause adverse reactions. Pollution: improper storage and preservation of traditional Chinese medicine causes rat bite, moth-eaten, pathogenic bacteria pollution, mildew and deterioration; Or drug farmers use a lot of chemical fertilizers and pesticides when planting medicinal materials, resulting in the residue of harmful substances such as pesticides in medicinal materials, which may lead to adverse drug reactions.