There is no such thing as eating onions on fire, proper consumption of onions can provide nutrition for the body, but if you are allergic to onions, it is not recommended to consume them to avoid abnormalities, and it is also not recommended to consume a large amount of them at one time to avoid burdening the stomach and intestines. Onion is a common food, rich in nutrients, every 100 grams of onion contains 40 calories, of which 9.34 grams of carbohydrates, 1.1 grams of protein, 0.1 grams of fat, 23 milligrams of calcium, vitamin C 7.4 milligrams. There is no such thing as eating onions on fire, and proper consumption can supplement the organism with nutrients. However, if you are allergic to onions, it is generally not recommended to consume them to avoid allergic reactions such as edema and itching, which can even be life-threatening in severe cases. In addition, the consumption of onions should be moderate, to avoid excessive intake at one time, so as not to aggravate the burden on the stomach and intestines, there is flatulence, excessive exhaust.