When we cut onions, we feel like crying. Why?

Because the cut onion will release an enzyme and produce irritating gas, at this time, the brain will send a signal to the lacrimal gland to make more tears to wash away these gases so as not to burn the eyes. This is a self-protection reaction of the human body.

When people cut onions, they will release a kind of alliinase, which will spread through the air, enter people's eyes and irritate the corneal peripheral nerves of people's eyes. Once people's eyes touch this kind of irritation, the human brain will instruct the lacrimal gland to metabolize tears and wash away this kind of irritation. Actually, it's not only like cutting onions, but also cutting some green onions and garlic. This belongs to the body's consciousness system. There is no harm to health.

In fact, many people are particularly annoyed with tears when cutting onions. Because they will not only shed tears, but also feel some sore eyes, there are many small ways on the Internet to prevent tears when cutting onions. Some people say that when I cut onions, I hold a mouthful of water in my lips, so it is not easy to shed tears. I don't think it is reliable. I usually cut onions quickly. I feel that my eyes have not had time to shed tears, and I have already cut them. Some people choose to soak onions in boiling water first. I heard that this problem can also be solved.

I think there are a lot of onions used in our daily life, such as scrambled eggs with onions, chicken curry, and beef with onions. All of them must be accompanied by onions. Even if it is not a main meal, many main meals must be accompanied by onions. It lives in all aspects of everyone's life. I may not see it for a day or two, but I can't leave it for a long time.

I don't think it's particularly painful to shed tears when cutting onions. If we want to get its delicious taste, we need to bear its pain. Life is like this, only when you invest can you get benefits. You have to give up something else in order to get what you want. Onions, garlic and green onions are all part of embellishment of life, and they are all walk-ons that everyone can't live without.