In recent years, the application of Chinese medicine in clinical practice has become more and more widespread, and is favored by more and more patients. In fact, many Chinese medicines, like some Western medicines, have the efficacy of curing diseases on the one hand, but on the other hand, they also have certain adverse reactions, which can also harm the body if not properly used. At present, reports on the adverse reactions of Chinese medicines are common, which can be roughly categorized into: toxic side effects, allergic reactions and carcinogenic effects. It can be seen that the adverse reactions of Chinese medicines can be quite extensive, and the main reasons are as follows: 1) overdose, some doctors casually increase the prescription and dosage of Chinese medicines, and some other patients do not follow the doctor’s instructions and overdose Chinese medicines by themselves. 2) blind superstition, some patients are overly superstitious about secret prescriptions, biased prescriptions and one-way remedies, and they casually misuse Chinese medicines. 3) differences in body qualities, such as the old and young, the frail, and pregnant women are easy to be poisoned, and people with allergies will have allergic reactions. 4) the use of Chinese medicines can cause adverse reactions, and some patients may have allergic reactions. People will have allergic reactions. In conclusion, with the expansion of the clinical application of Chinese medicines, we should be very careful in using Chinese medicines, and correctly grasp the indications, dosage and usage of Chinese medicines, so as not to abuse them. Carcinogenic effects of Chinese medicines: In recent years, studies have shown that some Chinese medicines have the danger of causing tumors. For example, betel nut contains betel quid alkaloids, camellia sinensis contains double thickened crocodiline alkaloids, white crocodile contains phenanthridine alkaloids, and these alkaloids can induce skin cancer and lung cancer. The incidence of oral cancer is higher in Taiwan and Changde, Hunan, China, and studies have shown that this is related to the long-term betel nut chewing of the residents in this region. For example, cinnamon, cinnamon bark, earth mustard, calamus, star anise, fennel, nutmeg, fine spices, pepper, peppercorns and other traditional Chinese medicines contain carcinogenic phenylpropene derivatives in their volatile oils, which may induce liver and esophageal cancers when taken for a long period of time or in excessive amounts. In addition, Chinese medicines such as Chirimisu, Da Wu Feng Cao, Bee’s head, Nongjili, Purple Flowering Eggplant, Malt, Green Mullein, Aristolochia, Cinnabar Lotus, Mouton, Sanguisorba, Nitrate, Horse chestnut and so on, can induce liver cancer. Allergic reaction of traditional Chinese medicine: various allergic reactions caused by traditional Chinese medicine have been repeatedly reported, and there are more than 40 kinds of common sensitizing traditional Chinese medicines. For example, Andrographis paniculata, smallpox pollen, rhubarb, cypress, juniper berries, tiger’s cocktail, Salvia miltiorrhiza and croton, etc., which mainly cause urticaria, drug rashes, exfoliative dermatitis and allergic purpura. Banlangen, honeysuckle, andrographis paniculata, angelica and other Chinese medicines, on the other hand, can cause anaphylaxis. Some Chinese medicine injections and Andrographis paniculata injection, Chaihu injection, Panax quinquefolium injection, Rhizoma Coptidis injection, Fritillariae vulgaris injection, Verbena officinalis injection, and Dilophylax injection can also cause anaphylaxis, and attention must be paid to this when using them in the clinic. Toxic side effects of Chinese medicines: For example, Chinese medicines such as faraway flower, cinnamon, epiphyllum, lei gongteng, Shangluo, white fruit, almond, peach kernel, etc., can cause difficulty in whistling, pulmonary edema, whistling failure and other reactions of the whistling system. Chinese herbal medicines such as Bei Wu Jia Pi, Luo Bu Ma, Fu Shou Cao, Pseudostemma, Chuan Wu, Cao Wu, Artemisia, Cynanchum, Toadflax and Cang Er Zi can cause circulatory reactions such as palpitations and chest tightness, hypotension, arrhythmia and even shock. Bitter amygdala, croton, betel nut, glycyrrhiza glabra, coriander, halibut, toadstool, broad bean root, northern bean root, mugwort leaf, woolly asparagus, neem seed, yellow medicinal herb, celandine seed, petunia seed, Acacia bark, zedoary, nutmeg, clove, millenium light, Lei Gongteng, rhubarb, mulberry, half-saxifrage, smallpox pollen, castor bean seed, bushy tail, and other traditional Chinese medicines, which can cause nausea and vomiting, abdominal bloating, abdominal pain, diarrhea, jaundice and hepatic impairment, and other digestive system reactions. Reactions. Mutong, cinnamon, millennium health, earth shellac, spotted fibre, fish gall, smallpox pollen, cangdongzi, lei gongteng, castor beans and other traditional Chinese medicines may cause urinary system reactions such as abnormal urination, urinary pain and back pain, swelling and renal impairment, or even renal failure. Chuanwu, Caowu, Huo Ma Ren, Almond, Bitter Ginseng, Yan Hu Suo, Hou Pu, Xin Xin, Safflower, Bai Guo, Lei Gong Teng, Strychnine, Motherwort, Neem Root Bark and other traditional Chinese medicines can cause numbness of the mouth and lips, pain in the limbs, dizziness, irritability, convulsions, convulsions, lethargy, blurred consciousness or even coma and other neurological reactions. In addition, some proprietary Chinese medicines: such as white jade pills, boat car pills, vermillion pills, etc. (containing vermillion, red liters, mercury, light powder ingredients) can lead to mercury poisoning, asthma pills, Ruyi Dan (containing arsenic, andrographis) can lead to arsenic poisoning, San Huang Bao wax pills, Mithu Sang, Huang Dan, lead Dan, black tin Dan, etc. can lead poisoning. In addition, the current public in addition to ignoring some of the adverse effects of Chinese medicine, there is another point worth noting, that is, over-exaggerated or overly superstitious Chinese medicine. It is undeniable that Chinese medicine has made an important contribution to safeguarding the health of Chinese residents for thousands of years, and its theories have formed a system of their own. However, many diseases should be treated scientifically and objectively, and the best time for treatment should not be delayed because of the superstitious belief in Chinese medicine.