Cao Wu leads to human poisoning after the symptoms are in fact more obvious, and easy to be found, usually in general after taking a few minutes to half an hour can appear poisoning symptoms. Serious 4-6 hours can lead to death, and after death, the body is usually muscle straightening, asphyxiation signs are obvious, acute pulmonary stasis. Symptoms are mainly numbness of the whole body, frequent thirst, strong burning sensation in the stomach, and paralysis will gradually appear. After poisoning, the patient’s face and limbs will also appear spasmodic, with the development of the disease will be manifested as speech difficulties, confusion and so on. For serious patients will appear serious arrhythmia, respiratory failure, and even serious circulatory failure leading to death, so after the discovery of the must be sent to the hospital in a timely manner for treatment.