The reason of poisoning of edible cassava is that the edible cassava releases hydrocyanic acid after being explained by water in the gastrointestinal tract. Hydrocyanic acid is absorbed by the intestine and then enters the human blood. It can combine with cytochrome oxidase of cells, so that red blood cells can still carry oxygen to various tissues of the body, but tissues and cells can't use oxygen, which leads to suffocation in cells and severe hypoxia in the body. At the same time, hydrocyanic acid itself may also damage the respiratory center and motor center. Therefore, nausea, vomiting, dizziness, dizziness, headache, abdominal pain, facial expression fear and other symptoms usually appear after poisoning. In severe cases, pale face, cold skin, shortness of breath, limb twitching and death due to respiratory failure.

In order to prevent cassava poisoning, peel cassava before eating, soak potato meat with clear water, and dissolve cyanosides after a period of time.