Oral Yunnan Baiyao may have the following side effects: First, Yunnan Baiyao contains grass wu, if the patient has a history of allergy, long-term use of Yunnan Baiyao may appear allergic rash or anaphylactic shock, urticaria, and acute pharyngitis and other adverse reactions; Second, Yunnan Baiyao contains the toxic ingredient saponin, overdose will cause poisoning, severe headache, and platelet reduction, seriously affecting the human health; Third, taking Yunnan Baiyao will affect the body’s coagulation function, there may be upper respiratory bleeding and atrial conduction is blocked and other discomforts, serious conditions may lead to acute renal failure. Third, taking Yunnan Baiyao will affect the body’s coagulation function, may appear upper respiratory tract bleeding and atrial conduction is impeded and other discomforts, serious conditions may lead to acute renal failure. In short, when taking this drug, must read the instructions in detail, and under the guidance of the doctor to carry out the appropriate and reasonable to take, if there is really an adverse reaction, it is recommended that the patient immediately go to the hospital to check and cooperate with the treatment.