Nitrite in the body is recommended to eat a light diet, low sodium salt, eat more green vegetables, fruits, crude fiber and other foods, and drink plenty of plain water on a daily basis. Nitrite is widespread in the human environment, is the most common nitrogenous compounds in nature, the appearance and taste are similar to salt, meat products are also allowed to use as a coloring agent limited. Nitrite poisoning refers to poisoning caused by consuming cured meat products, pickles and spoiled vegetables with high nitrate or nitrite content, or caused by mistakenly consuming industrial sodium nitrite as table salt, which oxidizes the normal oxygen-carrying low iron hemoglobin in the blood into high iron hemoglobin, which loses its oxygen-carrying capacity and causes hypoxia in the tissues. High doses of nitrite will produce great toxicity, accidental consumption of nitrite will lead to nitrite food poisoning, long-term use will lead to esophageal cancer and stomach cancer. Daily should eat a light diet, do not eat rotten vegetables, drink more water, do not eat a lot of cured meat products, kimchi, etc., eat more fruits and vegetables rich in vitamin C and vitamin E and so on. If your body is positive for nitrite, consult a doctor for a clear diagnosis to avoid delays.